By early 1920, the Red Army had been very successful against the White armies. They defeated Denikin and signed peace treaties with Latvia and Estonia. The Polish front became their most important war theater and a plurality of Soviet resources and forces were diverted to it. In January 1920, the Red Army began concentrating a 700,000-strong force near the Berezina River and in Belarus. By the time the Poles launched their Kiev offensive, the Red Southwestern Front had about 82,847 soldiers, including 28,568 front-line troops. The Poles had some numerical superiority, estimated from 12,000 to 52,000 personnel. By the time of the Soviet counter-offensive in mid-1920 the situation had been reversed: the Soviets numbered about 790,000 - at least 50,000 more than the Poles; Tukhachevsky estimated that he had 160,000 "combat ready" soldiers; Piłsudski estimated his enemy's forces at 200,000-220,000.. How many of the Pole solders were not front-line troops?