List of formations of the United States Army during World War II

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This is a list of formations of the United States Army during the World War II. Many of these formations still exist today, though many by different designations. Included are formations that were placed on rolls, but never organized, as well as "phantom" formations used in the Allied Operation Quicksilver deception of 1944—these are marked accordingly.

Army groups

Field armies

Corps

Divisions

Airborne, armored, cavalry, infantry, and mountain divisions are grouped separately. The numbering system for the airborne and mountain divisions are a continuation of the infantry numbering system—"phantom" formations are an exception to that numbering system.

Airborne divisions

6th Airborne Division ("phantom" formation)
9th Airborne Division ("phantom" formation)
11th Airborne Division
13th Airborne Division
15th Airborne Division (unorganized)
17th Airborne Division
18th Airborne Division ("phantom" formation)
21st Airborne Division ("phantom" formation)
82nd Airborne Division
101st Airborne Division
135th Airborne Division ("phantom" formation)

Armored divisions

1st Armored Division
2nd Armored Division
3rd Armored Division
4th Armored Division
5th Armored Division
6th Armored Division
7th Armored Division
8th Armored Division
9th Armored Division
10th Armored Division
11th Armored Division
12th Armored Division
13th Armored Division
14th Armored Division
15th Armored Division ("phantom" formation)
16th Armored Division
18th Armored Division (constituted but never activated)
19th Armored Division (constituted but never activated)
20th Armored Division
21st Armored Division (constituted but never activated)
22nd Armored Division (constituted but never activated)
25th Armored Division ("phantom" formation)
39th Armored Division ("phantom" formation)

Cavalry divisions

Infantry divisions

1st Infantry Division
2nd Infantry Division
3rd Infantry Division
4th Infantry Division
5th Infantry Division
6th Infantry Division
7th Infantry Division
8th Infantry Division
9th Infantry Division
11th Infantry Division ("phantom" formation)
14th Infantry Division ("phantom" formation)
17th Infantry Division ("phantom" formation)
22nd Infantry Division ("phantom" formation)
24th Infantry Division
25th Infantry Division
26th Infantry Division
27th Infantry Division
28th Infantry Division
29th Infantry Division
30th Infantry Division
31st Infantry Division
32nd Infantry Division
33rd Infantry Division
34th Infantry Division
35th Infantry Division
36th Infantry Division
37th Infantry Division
38th Infantry Division
40th Infantry Division
41st Infantry Division
42nd Infantry Division
43rd Infantry Division
44th Infantry Division
45th Infantry Division
46th Infantry Division ("phantom" formation)
48th Infantry Division ("phantom" formation)
50th Infantry Division ("phantom" formation)
55th Infantry Division ("phantom" formation)
59th Infantry Division ("phantom" formation)
61st Infantry Division (constituted but never activated)
62nd Infantry Division (constituted but never activated)
63rd Infantry Division
65th Infantry Division
66th Infantry Division
67th Infantry Division (constituted but never activated)
68th Infantry Division (constituted but never activated)
69th Infantry Division
70th Infantry Division
71st Infantry Division
72nd Infantry Division (constituted but never activated)
73rd Infantry Division (constituted but never activated)
74th Infantry Division (constituted but never activated)
75th Infantry Division
76th Infantry Division
77th Infantry Division
78th Infantry Division
79th Infantry Division
80th Infantry Division
81st Infantry Division
83rd Infantry Division
84th Infantry Division
85th Infantry Division
86th Infantry Division
87th Infantry Division
88th Infantry Division
89th Infantry Division
90th Infantry Division
91st Infantry Division
92nd Infantry Division
93rd Infantry Division
94th Infantry Division
95th Infantry Division
96th Infantry Division
97th Infantry Division
98th Infantry Division
99th Infantry Division
100th Infantry Division
102nd Infantry Division
103rd Infantry Division
104th Infantry Division
105th Infantry Division (constituted but never activated)
106th Infantry Division
107th Infantry Division (constituted but never activated)
108th Infantry Division ("phantom" formation - activated following the war as the 108th Airborne Division)
109th Infantry Division ("phantom" formation)
112th Infantry Division ("phantom" formation)
119th Infantry Division ("phantom" formation)
125th Infantry Division ("phantom" formation)
130th Infantry Division ("phantom" formation)
141st Infantry Division ("phantom" formation)
157th Infantry Division ("phantom" formation)
Americal Division
Philippine Division

Mountain divisions

10th Mountain Division

Topics	Air warfare of World War II In Europe Blitzkrieg Comparative military ranks Cryptography Declarations of war Diplomacy Governments in exile Home front Australian United Kingdom United States Lend-Lease Manhattan Project British contribution Military awards Military equipment Military production Naval history Nazi plunder Opposition Technology Allied cooperation Mulberry harbour Total war Strategic bombing Puppet states Women Art and World War II Music in World War II Weather events during World War II
Theaters	Asia and Pacific China South-East Asia Pacific North and Central Pacific South-West Pacific Indian Ocean Europe Western Front Eastern Front Mediterranean and Middle East North Africa East Africa Italy West Africa Atlantic timeline Americas
Aftermath	Chinese Civil War Cold War Decolonization Division of Korea First Indochina War Expulsion of Germans Greek Civil War Indonesian National Revolution Keelhaul Marshall Plan Occupation of Germany Occupation of Japan Osoaviakhim Paperclip Soviet occupations Baltic Hungary Poland Romania Territorial changes of Germany Treaty on the Final Settlement with Respect to Germany United Nations
War crimes	Allied war crimes Soviet war crimes British war crimes United States war crimes German war crimes forced labour Wehrmacht war crimes The Holocaust Aftermath Response Nuremberg trials Italian war crimes Japanese war crimes Nanjing Massacre Unit 731 Prosecution Croatian war crimes Genocide of Serbs Persecution of Jews Romanian war crimes Sexual violence German military brothels Camp brothels Rape during the occupation of Germany / Japan / Poland Rape during the liberation of France / Serbia Sook Ching Comfort women Rape of Manila Marocchinate

Participants

Allies	Algeria Australia Belgium Brazil Bulgaria (from September 1944) Canada China Cuba Czechoslovakia Denmark Ethiopia Eswatini (formerly Swaziland) Finland (from September 1944) France Free France Greece India Italy (from September 1943) Luxembourg Mexico Netherlands Newfoundland New Zealand Norway Philippines Poland Romania (from August 1944) Sierra Leone South Africa Southern Rhodesia Soviet Union Tuva United Kingdom British Empire United States Puerto Rico Yugoslavia
Axis	Albania protectorate Bulgaria (until September 1944) Wang Jingwei regime Independent State of Croatia Finland (until September 1944) German Reich Hungary Azad Hind French Indochina Iraq Italy (until September 1943) Italian Social Republic Empire of Japan Manchukuo Philippines Romania (until August 1944) Slovak Republic Thailand Vichy France Collaboration
Neutral	Afghanistan Andorra Bhutan Ireland Liechtenstein Portugal Spain Sweden Switzerland Tibet Vatican City
Resistance	Albania Austria Belgium Bulgaria Czech lands Denmark Dutch East Indies Estonia Ethiopia France Germany Greece Hong Kong Italy Japan Jews Korea Korean Liberation Army Korean Volunteer Army Latvia Lithuania Luxembourg Malaya Netherlands Northeast China Norway Philippines Poland Romania Thailand Soviet Union Slovakia Western Ukraine Vietnam Quốc dân Đảng Viet Minh Yugoslavia
POWs	Finnish prisoners in the Soviet Union German prisoners Soviet Union Azerbaijan United States United Kingdom Italian prisoners in the Soviet Union Japanese prisoners Soviet Union German atrocities against Polish POWs Soviet prisoners Finland atrocities by Germans Polish prisoners in the Soviet Union Romanian prisoners in the Soviet Union

Timeline

Prelude	Africa Second Italo-Ethiopian War Asia Second Sino-Japanese War Battles of Khalkhin Gol Europe Anschluss Munich Agreement Occupation of Czechoslovakia Operation Himmler Italian invasion of Albania
1939	Invasion of Poland Battle of the Atlantic Phoney War First Battle of Changsha Battle of South Guangxi Winter War 1939–1940 Winter Offensive
1940	Norwegian campaign German invasion of Denmark Battle of Zaoyang–Yichang German invasion of Luxembourg German invasion of the Netherlands German invasion of Belgium Battle of France Dunkirk evacuation Battle of Britain Battle of the Mediterranean North Africa West Africa British Somaliland Hundred Regiments Offensive Baltic states Eastern Romania Japanese invasion of French Indochina Italian invasion of Greece Compass
1941	Battle of South Henan Battle of Shanggao Invasion of Yugoslavia German invasion of Greece Battle of Crete Anglo-Iraqi War Battle of South Shanxi Syria–Lebanon campaign East African campaign Invasion of the Soviet Union Summer War Finland (Silver Fox) Lithuania Battle of Kiev Anglo-Soviet invasion of Iran Second Battle of Changsha Siege of Leningrad Battle of Moscow Bombing of Gorky Siege of Sevastopol Attack on Pearl Harbor Japanese invasion of Thailand Fall of Hong Kong Fall of the Philippines Battle of Guam Battle of Wake Island Malayan campaign Battle of Borneo Japanese invasion of Burma Third Battle of Changsha Greek famine of 1941–1944
1942	Fall of Singapore Battle of the Java Sea St Nazaire Raid Battle of Christmas Island Battle of the Coral Sea Battle of Madagascar Zhejiang-Jiangxi campaign Battle of Gazala Battle of Dutch Harbor Battle of Midway Aleutian Islands campaign Kiska Attu Blue First Battle of El Alamein Battle of Stalingrad Kokoda Track campaign Rzhev Jubilee Second Battle of El Alamein Guadalcanal campaign Torch Chinese famine of 1942–1943
1943	Black May Tunisian campaign Battle of West Hubei Battle of Attu Bombing of Gorky Battle of Kursk Allied invasion of Sicily Smolensk Solomon Islands campaign Cottage Battle of the Dnieper Allied invasion of Italy Armistice of Cassibile Burma Northern Burma and Western Yunnan Changde Second Battle of Kiev Gilbert and Marshall Islands campaign Tarawa Makin Bengal famine of 1943
1944	Tempest Monte Cassino / Anzio Korsun–Cherkassy Narva Ichi-Go Overlord Neptune Mariana and Palau Bagration Western Ukraine Second Battle of Guam Tannenberg Line Warsaw Uprising Eastern Romania Liberation of Paris Dragoon Gothic Line Belgrade offensive Lapland Market Garden Estonia Crossbow Pointblank Vietnamese famine of 1944–1945 Philippines (1944–1945) Leyte Syrmian Front Hungary Budapest Burma (1944–1945) Ardennes Bodenplatte Dutch famine of 1944–1945
1945	Vistula–Oder Battle of Manila Battle of Iwo Jima Indochina Vienna offensive Project Hula Western invasion of Germany Bratislava–Brno offensive Battle of Okinawa Second Guangxi campaign West Hunan Italy (Spring 1945) Battle of Berlin Prague offensive Surrender of Germany document Borneo Taipei Naval bombardment of Japan Manchuria Atomic bombings Debate South Sakhalin Kuril Islands Shumshu Surrender of Japan Potsdam Declaration document End of World War II in Asia

References

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