The Don region was required by the Soviets to make a grain contribution equal to the total annual production of the area. Almost all Cossacks joined the Green Army or other rebel forces. Together with Baron Wrangel's troops, they forced the Red Army out of the region in August 1920. After the retaking of the Crimea by Red Army, the Cossacks again became victims of the Red Terror. Special commissions in charge of decossackization condemned more than 6,000 people to death in October 1920 alone. The families and often the neighbors of suspected rebels were taken as hostages and sent to concentration camps. According to Martin Latsis who led the Ukrainian Cheka: