Harry 81 | 13,362 13 Mar 2013 #31Any ideas what he could have actually done?I've never heard the word Arbeitskommando used in any connection for German troops who took part in the Holocaust. It was used to describe the victims who formed the different types of 'work squads'. If your father was OT, he could have been doing anything from digging ditches to constructing bunkers. But OT members were not members of the Germany army.could his unit have been there for the other side (horrible thought of Poles fighting Poles).It's entirely possible he was on the other side. It wouldn't have been particularly unusual: Poles fought on both sides in North Africa and in the Western theatre (captured 'German' soldiers who spoke Polish or whose paybooks showed them to have been born in Poland were sometimes given the choice on being captured whether they'd like the rifle and paybook of a dead Polish soldier); there's a story about a Polish soldier at Monte Casino even meeting his brother there (who was fighting on the other side), but that might well be lacking some truth.There's a German govt organisation called Deutsche Dienststelle which has records about persons who served in the German armed forces, you might want to get in touch with them.