Original: At this critical juncture, Hitler assumed personal control of the Wehrmacht high command, and his personal failings as a military commander arguably contributed to major defeats in early 1943, at Stalingrad and Tunis in North Africa.
Simplified: At this critical juncture, Hitler assumed personal control of the Wehrmacht high command, and his personal failings as a military commander arguably contributed to major defeats in the spring of 1943, at Stalingrad and Tunis in North Africa.