How did Stalin’s purges of the Red Army influence Hitler’s expectations for the invasion?

Stalin’s purges of the Red Army in the late 1930s significantly influenced German expectations for the invasion of the Soviet Union. By decimating the officer corps—including the execution of Marshal Mikhail Tukhachevsky and many other high-ranking generals—the purges severely reduced the morale and military efficiency of the Soviet forces.12

These internal upheavals contributed to the German belief that the Soviet military was weak and disorganized. Consequently, Adolf Hitler and the German High Command were convinced that the Red Army could be defeated in a short campaign of two to three months. Furthermore, the Germans held the mistaken political assumption that the Soviet regime would collapse from a lack of domestic support within three to six months of the invasion. While the purges did result in serious initial defeats for the Soviets during the 1941 invasion, the German leadership ultimately underestimated the Soviet Union's ability to mobilize vast reserves and the resilience of its forces, which eventually halted the German advance.3452