The Soviet Union offered support to the partisans in many "Wehrmacht"-occupied countries in Central Europe, notably those in Slovakia, Poland. In addition, the Polish Armed Forces in the East, particularly the First and Second Polish armies, were armed and trained, and would eventually fight alongside the Red Army. The Free French forces also contributed to the Red Army by the formation of the GC3 ("Groupe de Chasse 3" or 3rd Fighter Group) unit to fulfil the commitment of Charles de Gaulle, leader of the Free French, who thought that it was important for French servicemen to serve on all fronts.