Complex sentence: Zhukov convinced Stalin to give him the extra forces he needed, and he commanded Western Fronts attacks until in the latter part of August Zhukov became deputy supreme commander, and was transferred to Stalingrad.
Split into simpler sentences: Zhukov convinced Stalin to give him the extra forces he needed. He commanded Western Fronts attacks until, in the latter part of August, Zhukov became deputy supreme commander, and was transferred to Stalingrad.