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The 343. Infanterie-division was formed on 1 October 1942 on the Truppenübungsplatz (training ground) of Grafenwöhr in Wehrkreis XIII.
In November 1942, it was sent to France in the Brest region of Brittany as an occupation and coastal defense force.
It found itself surrounded by American forces in Brest from August 1944 and withdrew to the Crozon peninsula.
The division was destroyed on 19 September 1944 with the fall of Brest Fortress and officially dissolved on 29 September 1944.
Commanders
Generalleutnant Friedrich Zickwolff (28 September 1942 - 25 August 1943) : died of wounds inflicted by French Partisans
Generalmajor Hermann Kruse (25 August 1943 - 1 February 1944)
Generalleutnant Erwin Rauch (1 February 1944 - 18 September 1944) : POW