The United States handed over 740,000 German prisoners to France, a signatory of the Geneva Convention. The Soviet Union had not signed the Geneva Convention. According to Edward Peterson, the U.S. chose to hand over several hundred thousand German prisoners to the Soviet Union in May 1945 as a "gesture of friendship". U.S. forces also refused to accept the surrender of German troops attempting to surrender to them in Saxony and Bohemia, and handed them over to the Soviet Union instead. It is also known that 6000 of the German officers who were sent from camps in the West to the Soviets were subsequently imprisoned in the Sachsenhausen concentration camp, which at the time was one of the NKVD special camps.