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The Yugoslav order of battle before the invasion of Yugoslavia includes a listing (or order of battle) of all operational formations of the Royal Yugoslav Army (Serbo-Croatian Latin: Vojska Kraljevine Jugoslavije, VKJ), Royal Yugoslav Army Air Force (Serbo-Croatian Latin: Vazduhoplovstvo Vojske Kraljevine Jugoslavije, VVKJ) and Royal Yugoslav Navy (Serbo-Croatian Latin: Kraljevska Jugoslovenska Ratna Mornarica, KJRM) immediately prior to the World War II invasion of that country in April 1941.

The VKJ consisted of 33 divisions and a significant number of smaller formations, but due to tentative and incomplete mobilisation, only seven divisions and four smaller formations are known to have been at close to fighting strength and in their planned deployment locations when the German-led Axis assault commenced on 6 April 1941. The Yugoslav defence plan involved placing the bulk of its land forces close to its borders, with very limited strategic reserves in depth. Almost all of the divisions that had been effectively mobilised were concentrated in the 3rd Army Group deployed in the east of the country along the Romanian and Bulgarian borders between the Iron Gates and the Greek border. Most of the heavy weapons and armoured vehicles available to the VKJ were obsolete, most formations were heavily reliant on animal-powered transport, and the VKJ had only 50 tanks that could engage front line German tanks on an equal basis.

By 6 April 1941, the VVKJ had been almost completely mobilised, and consisted of four air brigades with more than 423 aircraft of Yugoslav, German, Italian, French, Czech and British design, including 107 modern fighter aircraft, and 100 modern medium bombers. Other than a small number of locally made Rogožarski IK-3 fighters, almost all the modern aircraft available to the VVKJ were of German, Italian or British design for which limited spares and munitions were available.

The KJRM consisted of a flotilla of river monitors based on the Danube and a small fleet based in several ports along the Adriatic coast. The blue-water navy centred on a flotilla leader, three smaller destroyers, four obsolescent submarines and a gunboat, supplemented by minelayers and torpedo boats. Some of the smaller vessels in the Yugoslav fleet had been inherited from the defeated Austro-Hungarian Empire following World War I and were obsolete.

Royal Yugoslav Army

At the time of the invasion, the Royal Yugoslav Army (Serbo-Croatian Latin: Vojska Kraljevine Jugoslavije, VKJ) consisted of 29 infantry divisions, three horse cavalry divisions, and a divisional-sized mountain detachment. There were also a significant number of independent infantry, cavalry, mountain, and combined arms brigades, infantry and cavalry regiments and fortress troops, as well as 17 border guard battalions. The Commander-in-chief of the VKJ was the 17-year-old King Peter II, and the Chief of the General Staff was the Prime Minister, Armijski đeneral Dušan Simović. The Yugoslav defence plan positioned almost all land forces close to its borders, with very limited strategic reserves in depth. The VKJ was heavily reliant on animal-powered transport, mainly oxen, and had only 50 relatively modern Renault R35 tanks that could fight German tanks on an equal footing, although these were only just being formed into a unit at the time of the invasion. The VKJ was organised into the 1st, 2nd and 3rd Army Groups, the independent 5th and 6th Armies and the Coastal Defence Command. The General Headquarters of the VKJ maintained command over five infantry divisions and a large number of smaller infantry, engineer and artillery units, as well as the only operational tank battalion. Each Army Group and independent Army was supported by an air reconnaissance group attached from the Royal Yugoslav Army Air Force (VVKJ). As mobilisation had been tentative and partial, many divisions were still in the process of mobilisation on 6 April 1941. The VKJ order of battle on 6 April 1941 is detailed below as provided by Niehorster.

mobilised Mobilised less staff and rear units.
in part Partly mobilised and moving to concentration area or assigned frontier.
commenced In process of mobilisation.
unknown Mobilisation status unknown.

1st Army Group

The 1st Army Group was commanded by Armijski đeneral Milorad Petrović. It consisted of the 4th Army of Armijski đeneral Petar Nedeljković, responsible for the Yugoslav-Hungarian border and deployed behind the Drava between Varaždin and Slatina, and the 7th Army of Divizijski đeneral (Major General) Dušan Trifunović, which was responsible for the defence of the northwestern border with Italy and the Third Reich.

4th Army support units included one motorised heavy artillery regiment, one artillery regiment, a motorised anti-aircraft battalion, six border guard battalions, and the 4th Air Reconnaissance Group comprising eighteen Breguet 19s was attached from the VVKJ and was based at Velika Gorica just south of Zagreb. The 7th Army was supported by one artillery regiment and the 6th Air Reconnaissance Group consisting of sixteen Breguet 19s based at Brežice, northwest of Zagreb.

2nd Army Group

The 2nd Army Group was commanded by Armijski đeneral Milutin Nedić, and consisted of Armijski đeneral Milan Rađenković's 1st Army, responsible for the area between the Danube and the Tisza, and the 2nd Army of Armijski đeneral Dragoslav Miljković, responsible for the border from Slatina to the Danube. There was no Army Group reserve, but the 2nd Army was to constitute a reserve consisting of the 10th Infantry Division Bosanska deployed south of Brod.

The 1st Army was supported by one artillery regiment, one anti-aircraft battalion, and the 1st Air Reconnaissance Group consisting of fifteen Breguet 19s based at Ruma, just west of Sremska Mitrovica. 2nd Army support units comprised one artillery regiment, one anti-aircraft battalion, one border guard battalion, and the 3rd Air Reconnaissance Group consisting of sixteen Breguet 19s based at Staro Topolje just east of Brod.

3rd Army Group

The 3rd Army Group was commanded by Armijski đeneral Milan Nedić. It consisted of Armijski đeneral Ilija Brašić's 3rd Army, responsible for the border with Albania between Lake Ohrid to Lake Skadar, and the 3rd Territorial Army of Armijski đeneral Jovan Naumović, which was responsible for the eastern sector of the Greek border and a sector along the Bulgarian border. The Army Group reserve consisted of the 22nd Infantry Division Ibarska, deployed around Skopje.

3rd Army support units included one artillery regiment, one anti-aircraft battalion, eight border guard battalions, and the 5th Air Reconnaissance Group consisting of fourteen Breguet 19s based at Tetovo west of Skopje. The 3rd Territorial Army was supported by one motorised heavy artillery regiment.

5th Independent Army

The 5th Independent Army was commanded by Armijski đeneral Vladimir Cukavac, and had responsibility for the Romanian and Bulgarian borders between the Iron Gates and the Greek border.

The support units of the 5th Independent Army were two motorised heavy artillery regiments, an anti-aircraft battalion, two border guard battalions, and the 2nd Air Reconnaissance Group consisting of sixteen Breguet 19s based at Šarlince south of Niš.

6th Independent Army

The 6th Independent Army was commanded by Armijski đeneral Dimitrije Živković, and was originally intended to form the strategic reserve for the VKJ. It was deployed around Belgrade and in the Banat region east of the Tisza. It held two infantry divisions in reserve in the lower Morava valley.

The 6th Independent Army was supported by an anti-aircraft battalion and the 7th Air Reconnaissance Group consisting of eighteen Breguet 19s based at Smederevska Palanka.

Coastal Defence Command

Coastal Defence Command was commanded by Armijski đeneral Živko Stanisaviljević, and was responsible for the defence of the Adriatic coast from the Bay of Kotor to Gospić.

Coastal Defence Command was supported by a heavy artillery regiment and an anti-aircraft battalion, and a coastal reconnaissance squadron of four aircraft based near Mostar.

General Headquarters Direct Command

General Headquarters of the VKJ maintained direct command of five infantry divisions, four independent infantry regiments, two motorised engineer regiments and one tank battalion. A further tank battalion was being formed at the time of the invasion. It also had at its disposal two motorised heavy artillery regiments, fifteen artillery battalions, two anti-aircraft battalions and five independent anti-aircraft companies.

Major equipment

In April 1941, a significant amount of obsolete equipment was in service with the VKJ, much of which was of World War I vintage. For example, of the 7,000 artillery pieces, less than 60 per cent were relatively modern, and only 50 of the tanks on hand were of comparable quality to front line German tanks. The army inventory included the following major items of equipment:

• Major items of equipment in service with the Royal Yugoslav Army
• The French made FT tank was designed during World War I, and by 1941 was no match for German front line tanks.
• Škoda 37 mm Model 1937 anti-tank gun
• A World War I vintage Schneider-Ansaldo 105 mm M1913 field howitzer

Royal Yugoslav Army Air Force

By April 1941, due to the difficulties Yugoslavia had faced in sourcing aircraft, the Royal Yugoslav Army Air Force (Serbo-Croatian Latin: Vazduhoplovstvo Vojske Kraljevine Jugoslavije, VVKJ) was equipped with 11 different types of operational aircraft, 14 types of training aircraft, and five types of auxiliary aircraft. These aircraft used 22 different engines, four different machine guns and two models of aircraft cannon. This made the training, supply and maintenance of the VVKJ quite problematic. The VVKJ was organised into a headquarters, four air brigades and one naval brigade. Its order of battle on 6 April 1941 is detailed below as provided by Shores, Cull and Malizia, the most detailed work available on the subject.

Air Force Headquarters

The VVKJ was commanded by Brigadni General (Brigadier) Borivoje Mirković, from his headquarters at Lješnica, and had two air groups and one independent squadron under its direct command. Niehorster includes the VVKJ transport group and the air training school as under the direct command of Army Air Force Headquarters, and they have been shown here for completeness.

1st Fighter Brigade

The 1st Fighter Brigade was commanded by Pukovnik (Colonel) Dragutin Rupčić, whose headquarters was at Zemun. It consisted of the 2nd and 6th Fighter Regiments and a liaison squadron.

2nd Mixed Air Brigade

The 2nd Mixed Air Brigade was commanded by Pukovnik Jakov Đorđević, whose headquarters was at Nova Topola. It consisted of the 4th Fighter Regiment, the 8th Bomber Regiment, and a liaison squadron.

3rd Mixed Air Brigade

The 3rd Mixed Air Brigade was commanded by Pukovnik Nikola Obuljen, whose headquarters was at Stubol. It consisted of the 3rd Bomber Regiment, 5th Fighter Regiment, and a liaison squadron.

4th Bomber Brigade

The 4th Bomber Brigade was commanded by Pukovnik Petar Vukčević, whose headquarters was at Ljubić. It consisted of the 1st and 7th Bomber Regiments and a liaison squadron.

Aircraft types

The Royal Yugoslav Army Air Force inventory in April 1941 included more than 423 aircraft of Yugoslav, German, Italian, French, Czech and British design, in addition to 20 largely civilian transport aircraft which had been pressed into military service. Of these, 107 of the fighter aircraft were of modern design, the remainder were not capable of meeting front line Axis aircraft on close to equal terms, and were therefore considered obsolete. Some bomber and reconnaissance aircraft were also considered obsolete for the same reason.

Aircraft types

Aircraft type	Model	Class	Number	Origin/notes
Fighter aircraft	Messerschmitt Bf 109E-3	—	61	Germany
	Hawker Hurricane Mk I	—	41	United Kingdom
	Hawker Fury Mk II biplane	—	30	United Kingdom (obsolete)
	Ikarus IK-2	—	8	Yugoslavia (obsolete)
	Rogožarski IK-3	—	6	Yugoslavia
	Avia BH-33E	—	6	Czechoslovakia (obsolete)
Bomber aircraft	Dornier Do 17Ka	medium	60	Germany
	Savoia-Marchetti SM 79-I	medium	40	Italy
	Bristol Blenheim Mk I	light	56	United Kingdom
	Hawker Hind Mk I biplane	light	2	United Kingdom (obsolete)
Reconnaissance aircraft	Caproni Ca.310	—	unknown	Italy
	Breguet 19	—	113	France (obsolete)
Liaison aircraft	Messerschmitt Bf 108	—	unknown	Germany
	Fieseler Fi 156	—	unknown	Germany

Between 6 and 17 April 1941, the VVKJ took receipt of additional aircraft, including eight Hawker Hurricane Mk Is, six Dornier Do 17Ks, four Bristol Blenheim Mk Is, two Icarus IK-2s, one Messerschmitt Bf 109E-3 and one Rogožarski IK-3.

• Aircraft types in service with the Royal Yugoslav Army Air Force
• A Messerschmitt Bf 109E-3 with VVKJ markings
• A Rogožarski IK-3 with VVKJ markings
• A Dornier Do 17Ka with VVKJ markings
• A Savoia-Marchetti SM 79-I with VVKJ markings

Royal Yugoslav Navy

The Royal Yugoslav Navy (Serbo-Croatian Latin: Kraljevska Jugoslovenska Ratna Mornarica, KJRM) was small, with its largest ships being an obsolete former German light cruiser (used as a gunnery training ship), one flotilla leader, and three smaller Beograd-class destroyers. The Chief of the Naval Staff was Rear-Admiral M.L. Polić, and the personnel of the KJRM comprised about 611 officers and 8,562 men. The KJRM was organised into Riverine and Lake Forces, the Maritime Air Force, Naval Coastal Command, three torpedo divisions, the Submarine Division, and a grouping of miscellaneous and training vessels.

Riverine and Lake Forces

The Riverine and Lake Forces of the KJRM were headquartered on the Danube river in Novi Sad, and were organised into the River Flotilla and three Lake Detachments. Each division of the River Flotilla except the Monitor Division included one or more mobilised customs motorboats.

River Flotilla

Division	Ship/vessel name	Type	Origin/notes
Monitor Division HQ: Dubovac	Vardar	river monitor	Austria-Hungary former Austro-Hungarian Navy river monitor Bosna
	Sava	river monitor	Austria-Hungary former Austro-Hungarian Navy river monitor Bodrog
1st Mine Barrage Division HQ: Bezdan	Drava	river monitor	Austria-Hungary former Austro-Hungarian Navy river monitor Enns
	Šabac	river tugboat	—
	—	river minelayer	—
	—	river minelayer	—
	—	river transport	—
2nd Mine Barrage Division HQ: Stara Kanjiža	Morava	river monitor	Austria-Hungary former Austro-Hungarian Navy river monitor Körös
	R-XXI	river tugboat	—
	Senta	river transport	—
3rd Mine Barrage Division HQ: Sremski Karlovci	Sisak	river tugboat	—
	—	river mine-layer	—
	—	river mine-layer	—
	—	river transport	—
4th Mine Barrage Division HQ: Smederevo	Raška	river tugboat	—
	—	river mine-layer	—
	—	river mine-layer	—
	—	river transport	—
5th Mine Barrage Division HQ: Erdut	Tanasko Rajić	river tugboat	—
	—	river mine-layer	—
	—	river mine-layer	—
	—	river transport	—
Iron Gates Division HQ: Donji Milanovac	Kumanovo	river tugboat	—
	Vitez	river tugboat	—
	—	river transport	—
	—	river transport	—
	—	river transport	—
	—	river transport	—

The Lake Ohrid Detachment was based at Ohrid and consisted of two river gunboats, Graničar and Stražar, and one or more mobilised customs motorboats. The Lake Prespa Detachment was based at Asamati, and it is unclear where the Lake Skadar Detachment was based. Both of the latter detachments consisted of one or more mobilised customs motorboats.

Maritime Air Force

The Maritime Air Force was headquartered at Kaštel Lukšić near Split, and consisted of three Hydroplane Commands each of regimental strength.

Naval Coastal Command

The Naval Coastal Command of the KJRM was organised into three sectors along the Adriatic coast of Yugoslavia.

Torpedo Divisions

The 1st Torpedo Division consisted of the flotilla leader Dubrovnik and two of the three Beograd-class destroyers, and was based at Kotor. The remaining Beograd-class destroyer, Ljubljana, was under repair at Šibenik at the time of the invasion. The 2nd and 3rd Torpedo Division consisted of torpedo boats, and were both based at Šibenik.

Submarine Division

The Submarine Division was based in Kotor, and consisted of the submarine tender Hvar and four ageing submarines of British or French manufacture.

Miscellaneous vessels

The KJRM included several miscellaneous vessels that were not allocated to a particular division. They included the gunnery training ship Dalmacija, the gunboat Beli Orao and the converted seaplane tender/minelayer Zmaj.

• Vessels in service with the Royal Yugoslav Navy
• The light cruiser and gunnery training ship Dalmacija and the minelayers Mljet and Meljine docked at the Bay of Kotor
• The destroyers Dubrovnik (left) and Beograd after their capture by Italy
• The submarine Hrabri
• The torpedo boat T3

See also

• Hawker Hurricane in Yugoslav service
• List of ships of the Royal Yugoslav Navy

Notes

1. Armijski đeneral was equivalent to a United States lieutenant general.
2. There are significant differences between sources on the components of Royal Yugoslav Army formations, so Niehorster, being the most recent source, has been used to ensure consistency throughout, except where it diverges from Terzić, a comprehensive Yugoslav source.
3. According to Barefield, the majority of the 1st Cavalry Division constituted an Army Group reserve, and was located in the Zagreb area.
4. According to Niehorster, Mountain Detachment Triglavski consisted of two mountain infantry regiments and a mountain artillery battalion, but Terzić states it consisted of one mountain infantry regiment and a mountain artillery battalion.
5. According to Niehorster, Mountain Detachment Rišnajaski consisted of two mountain infantry regiments and a mountain artillery battalion, but Terzić states it consisted of one mountain infantry regiment and a mountain artillery battalion.
6. Detachment Savski consisted of the 1st Guards Infantry Regiment, the Guards Artillery Regiment and two motorised heavy artillery regiments.
7. Detachment Banatiski consisted of the 4th Infantry Regiment, the 8th Cavalry Regiment (horse), 1st Guards Cavalry Regiment (horse), 2nd Guards Cavalry Regiment (horse), the horse-drawn Guards Artillery Battalion, and one artillery battalion.
8. Boka Kotorska Command was commanded by Brigadni General (Brigadier) Vojislav Kuzmanović, and consisted of three fortress infantry regiments.
9. Šibenik Command was a fortress infantry formation of brigade-strength.
10. The 1st Tank Battalion was equipped with 48 Renault FT and Renault NC27 light tanks and 8 Škoda S-1d light tanks.
11. The 2nd Tank Battalion was being formed with Renault R35 light tanks.
12. Any differences with Niehorster, being a more recent but general source, have been identified in the text or through the use of notes.
13. Two Avia BH-33Es were detached to Podgorica.
14. Aircraft types are consistent between Shores, Cull and Malizia, and Niehorster. Aircraft numbers are only provided by Niehorster.
15. The aircraft types and numbers for the Transport Group are only provided by Niehorster.
16. The aircraft types and numbers for the Air Training School are only provided by Niehorster. Shores, Cull and Malizia specify that there were ten training units, some of which were incorporated into operational regiments, with some being independent units. They state that they were equipped with Breguet 19s, Potez 25s and Caproni Ca.310 aircraft, and a large number of basic training aircraft of Yugoslav origin, but including some German Bücker Bü 131s.
17. Shores, Cull and Malizia, specify Messerschmitt Bf 108 liaison aircraft and Fieseler Fi 156 liaison aircraft, Niehorster specifies Messerschmitt Bf 109E-3a fighters instead of Fieseler Fi 156 liaison aircraft.
18. Neither Shores, Cull and Malizia, or Niehorster. specify aircraft numbers
19. Neither Shores, Cull and Malizia, or Niehorster. specify aircraft numbers
20. Niehorster specifies that the 61st Bomber Group included 2 × Breguet 19 reconnaissance aircraft and 1 × Bücker Bü 131 biplane trainer aircraft.
21. Niehorster specifies that the 62nd Bomber Group included 2 × Breguet 19 reconnaissance aircraft and 1 × Bücker Bü 131 biplane trainer aircraft.
22. Neither Shores, Cull and Malizia, or Niehorster specify aircraft numbers
23. This figure was the total in 1938.
24. The Kumanovo and two river transports formed the Juc Canal Group.
25. The Vitez and two river transports formed the Sipski Canal Group.
26. Shores, Cull and Malizia specify only two Hydroplane Commands, the 2nd and 3rd.
27. Shores, Cull and Malizia state that the 11th Hydroplane Squadron included 8–10 elderly training aircraft.
28. Shores, Cull and Malizia state that the 21st Hydroplane Squadron included a "Fleet" aircraft, but it is unclear what type they are referring to.
29. Shores, Cull and Malizia state that the Training Squadron included a "Fleet" aircraft, but it is unclear what type they are referring to.
30. Niehorster does not list the minelayers Gavran, Orao and Sokol, but both Willmott and Chesneau list them as active in the KJRM at the time of the invasion, so they have been included here for completeness.

Footnotes

1. Niehorster 2013v.
2. ^ Niehorster 2013a.
3. Tomasevich 1975, p. 56.
4. ^ Zajac 1993, p. 47.
5. Tomasevich 1975, pp. 58–59.
6. ^ Niehorster 2013k.
7. Barefield 1993, pp. 49–54.
8. Anic 2002, p. 31.
9. ^ Niehorster 2013b.
10. ^ U.S. Army 1986, p. 37.
11. Loi 1978, p. 43.
12. ^ Niehorster 2013c.
13. U.S. Army 1986, pp. 36–37.
14. ^ Barefield 1993, p. 53.
15. Barefield 1993, pp. 52–53.
16. ^ Terzić 1982, p. 164.
17. ^ Niehorster 2013d.
18. ^ Niehorster 2013e.
19. ^ Niehorster 2013f.
20. ^ Niehorster 2013g.
21. Geografski institut JNA 1952.
22. ^ Barefield 1993, p. 54.
23. ^ Barefield 1993, pp. 53–54.
24. ^ Niehorster 2013h.
25. ^ Niehorster 2013i.
26. ^ Niehorster 2013j.
27. Tomasevich 1975, p. 59.
28. ^ Shores, Cull & Malizia 1987, p. 173.
29. Shores, Cull & Malizia 1987, pp. 187–192.
30. ^ Shores, Cull & Malizia 1987, p. 187.
31. ^ Niehorster 2013l.
32. ^ Shores, Cull & Malizia 1987, p. 191.
33. Shores, Cull & Malizia 1987, pp. 187–188.
34. ^ Shores, Cull & Malizia 1987, p. 188.
35. Niehorster 2013m.
36. Shores, Cull & Malizia 1987, pp. 188–189.
37. Niehorster 2013n.
38. ^ Shores, Cull & Malizia 1987, p. 189.
39. Niehorster 2013o.
40. ^ Shores, Cull & Malizia 1987, p. 190.
41. ^ Niehorster 2013p.
42. Savić & Ciglić 2002, p. 9.
43. Willmott 2010, pp. 310–311.
44. ^ Zajac 1993, p. 48.
45. Jarman 1997, pp. 92–94.
46. ^ Niehorster 2013q.
47. ^ Niehorster 2013r.
48. ^ Niehorster 2013s.
49. ^ Chesneau 1980, p. 357.
50. ^ Willmott 2010, p. 310.
51. ^ Jane's Information Group 1989, p. 315.
52. Niehorster 2013t.
53. Vego 1982, p. 354.
54. Niehorster 2013u.
55. ^ Willmott 2010, p. 311.
56. ^ Chesneau 1980, p. 358.
57. Haworth 2006a.
58. Haworth 2006b.
59. Vego 1982, p. 344.
60. ^ Brescia 2012, p. 134.
61. ^ Chesneau 1980, p. 359.
62. ^ Chesneau 1980, pp. 358–359.
63. Akermann 2002, p. 168.
64. Haworth 2006c.
65. Haworth 2006d.
66. Gröner 1991, p. 119.

References

Books and journals

• Akermann, Paul (2002). Encyclopedia of British Submarines 1901–1955. Penzance, Cornwall: Periscope Publishing. ISBN 978-0-907771-42-5.
• Anic, Nikola (2002). Njemačka vojska u Hrvatskoj 1941–1945 [The German Army in Croatia 1941–1945] (in Croatian). Zagreb, Croatia: Hrvatski institut za povijest (Croatian Institute of History). ISBN 978-953-6491-77-3.
• Brescia, Maurizio (2012). Mussolini's Navy. Barnsley, South Yorkshire: Seaforth Publishing. ISBN 978-1-59114-544-8.
• Chesneau, Roger, ed. (1980). Conway's All the World's Fighting Ships 1922–1946. London, England: Conway Maritime Press. ISBN 978-0-85177-146-5.
• Geografski institut JNA (1952). "Napad na Jugoslaviju 6 Aprila 1941 godine" [The Attack on Yugoslavia of 6 April 1941]. Istorijski atlas oslobodilačkog rata naroda Jugoslavije [Historical Atlas of the Yugoslav Peoples Liberation War]. Belgrade, Yugoslavia: Vojnoistorijskog instituta JNA . Archived from the original on 1 May 2013. Retrieved 8 May 2023.
• Gröner, Erich (1991). Jung, Dieter; Maass, Martin (eds.). U-boats and Mine Warfare Vessels. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London, England: Conway Maritime Press. ISBN 0-85177-593-4. {{cite book}}: |work= ignored (help)
• Jane's Information Group (1989) . Jane's Fighting Ships of World War II. London, England: Studio Editions. ISBN 978-1-85170-194-0.
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• Vego, Milan (1982). "The Yugoslav Navy 1918–1941". Warship International. XIX (4). Toledo, Ohio: International Naval Research Organisation: 342–361. ISSN 0043-0374.
• Willmott, H.P. (2010). The Last Century of Sea Power: From Washington to Tokyo, 1922–1945. Bloomington, Indiana: Indiana University Press. ISBN 978-0-253-35214-9.
• U.S. Army (1986) . The German Campaigns in the Balkans (Spring 1941). Washington, D.C.: United States Army Center of Military History. OCLC 16940402. CMH Pub 104-4. Archived from the original on 19 June 2009. Retrieved 26 June 2013.

Papers

• Barefield, Michael R. (May 1993). "Overwhelming Force, Indecisive Victory: The German Invasion of Yugoslavia, 1941". Fort Leavenworth, Kansas: School of Advanced Military Studies, United States Army Command and General Staff College. OCLC 32251055. Archived from the original on 8 April 2013. {{cite journal}}: Cite journal requires |journal= (help)
• Zajac, Daniel L. (May 1993). "The German Invasion of Yugoslavia: Insights For Crisis Action Planning And Operational Art in A Combined Environment". Fort Leavenworth, Kansas: School of Advanced Military Studies, United States Army Command and General Staff College. OCLC 32251097. Archived from the original on 8 April 2013. {{cite journal}}: Cite journal requires |journal= (help)

Websites

• Haworth, R.B. (2006a). "Spasilac". Miramar Ship Index. New Zealand: R.B. Haworth. 6109036. Archived from the original on 23 February 2016. Retrieved 10 April 2015.
• Haworth, R.B. (2006b). "Labud". Miramar Ship Index. New Zealand: R.B. Haworth. 6108024. Archived from the original on 23 February 2016. Retrieved 10 April 2015.
• Haworth, R.B. (2006c). "Hvar". Miramar Ship Index. New Zealand: R.B. Haworth. 1105810. Archived from the original on 23 February 2016. Retrieved 10 April 2015.
• Haworth, R.B. (2006d). "Perun". Miramar Ship Index. New Zealand: R.B. Haworth. 6110884. Archived from the original on 23 February 2016. Retrieved 11 April 2015.
• Niehorster, Leo (2013a). "Balkan Operations Order of Battle Royal Yugoslavian Army 6th April 1941". Leo Niehorster. Archived from the original on 2 April 2015. Retrieved 19 May 2014.
• Niehorster, Leo (2013b). "Balkan Operations Order of Battle Royal Yugoslavian Army 4th Army 6th April 1941". Leo Niehorster. Archived from the original on 2 April 2015. Retrieved 19 May 2014.
• Niehorster, Leo (2013c). "Balkan Operations Order of Battle Royal Yugoslavian Army 7th Army 6th April 1941". Leo Niehorster. Archived from the original on 2 April 2015. Retrieved 22 June 2014.
• Niehorster, Leo (2013d). "Balkan Operations Order of Battle Royal Yugoslavian Army 1st Army 6th April 1941". Leo Niehorster. Archived from the original on 2 April 2015. Retrieved 18 June 2014.
• Niehorster, Leo (2013e). "Balkan Operations Order of Battle Royal Yugoslavian Army 2nd Army 6th April 1941". Leo Niehorster. Archived from the original on 2 April 2015. Retrieved 19 May 2014.
• Niehorster, Leo (2013f). "Balkan Operations Order of Battle Royal Yugoslavian Army 3rd Army 6th April 1941". Leo Niehorster. Archived from the original on 2 April 2015. Retrieved 19 May 2014.
• Niehorster, Leo (2013g). "Balkan Operations Order of Battle Royal Yugoslavian Army 3rd Territorial Army 6th April 1941". Leo Niehorster. Archived from the original on 2 April 2015. Retrieved 19 May 2014.
• Niehorster, Leo (2013h). "Balkan Operations Order of Battle Royal Yugoslavian Army 5th Independent Army 6th April 1941". Leo Niehorster. Archived from the original on 2 April 2015. Retrieved 19 May 2014.
• Niehorster, Leo (2013i). "Balkan Operations Order of Battle Royal Yugoslavian Army 6th Independent Army 6th April 1941". Leo Niehorster. Archived from the original on 2 April 2015. Retrieved 19 May 2014.
• Niehorster, Leo (2013j). "Balkan Operations Order of Battle Royal Yugoslavian Army Coastal Defense Army 6th April 1941". Leo Niehorster. Archived from the original on 2 April 2015. Retrieved 19 May 2014.
• Niehorster, Leo (2013k). "Balkan Operations Order of Battle Royal Yugoslavian Army GHQ Direct 6th April 1941". Leo Niehorster. Archived from the original on 2 April 2015. Retrieved 19 May 2014.
• Niehorster, Leo (2013l). "Balkan Operations Order of Battle Royal Yugoslavian Air Force 6th April 1941". Leo Niehorster. Archived from the original on 2 April 2015. Retrieved 19 May 2014.
• Niehorster, Leo (2013m). "Balkan Operations Order of Battle Royal Yugoslavian Air Force 1st Fighter Wing 6th April 1941". Leo Niehorster. Archived from the original on 2 April 2015. Retrieved 19 May 2014.
• Niehorster, Leo (2013n). "Balkan Operations Order of Battle Royal Yugoslavian Air Force 2nd Mixed Air Wing 6th April 1941". Leo Niehorster. Archived from the original on 8 July 2015. Retrieved 19 May 2014.
• Niehorster, Leo (2013o). "Balkan Operations Order of Battle Royal Yugoslavian Air Force 3rd Mixed Air Wing 6th April 1941". Leo Niehorster. Archived from the original on 2 April 2015. Retrieved 19 May 2014.
• Niehorster, Leo (2013p). "Balkan Operations Order of Battle Royal Yugoslavian Air Force 4th Bomber Wing 6th April 1941". Leo Niehorster. Archived from the original on 2 April 2015. Retrieved 19 May 2014.
• Niehorster, Leo (2013q). "Balkan Operations Order of Battle Royal Yugoslavian Navy 6th April 1941". Leo Niehorster. Archived from the original on 2 April 2015. Retrieved 19 May 2014.
• Niehorster, Leo (2013r). "Balkan Operations Order of Battle Royal Yugoslavian Navy Riverine and Lake Forces 6th April 1941". Leo Niehorster. Archived from the original on 2 April 2015. Retrieved 19 May 2014.
• Niehorster, Leo (2013s). "Balkan Operations Order of Battle Royal Yugoslavian Navy River Flotilla 6th April 1941". Leo Niehorster. Archived from the original on 2 April 2015. Retrieved 19 May 2014.
• Niehorster, Leo (2013t). "Balkan Operations Order of Battle Royal Yugoslavian Navy Maritime Air Force 6th April 1941". Leo Niehorster. Archived from the original on 2 April 2015. Retrieved 19 May 2014.
• Niehorster, Leo (2013u). "Balkan Operations Order of Battle Royal Yugoslavian Navy Coastal Defense Command 6th April 1941". Leo Niehorster. Archived from the original on 10 October 2023. Retrieved 19 May 2014.
• Niehorster, Leo (2013v). "Royal Yugoslav Armed Forces Ranks". Leo Niehorster. Archived from the original on 5 March 2016. Retrieved 24 May 2014.

• World War II orders of battle
• Balkans campaign (World War II)
• Military of the Kingdom of Yugoslavia