Over 2 million Polish troops fought in the ranks of the armies of the Austria, Germany, Russia and France and 450,000 were killed. Many Poles served as professional or reserve officers. They were not only recruits but often volunteers collaborating with all powers and dreaming about autonomy or even independence. Practically all senior military officers of the Polish Army and resistance during WWII were veterans of Great War and/or Polish-Soviet War. For example, Wladyslaw Anders joined the Polish volunteer corps which fought alongside the Russians. In Polish-Soviet War he was CO of one of the cavalry regiments.