Complex sentence: The effort was partly a reflection of Mao's wish to eradicate Soviet influence, and under the conditions of separate base communist areas and incessant warfare, he could not rely on discipline alone to guarantee obedience in the CCP ranks.
Split into simpler sentences: The effort was partly a reflection of Mao's wish to eradicate Soviet influence. Under the conditions of independently operating Communist areas and incessant warfare, Mao could not rely on discipline alone to guarantee obedience in the CCP ranks.