Conversation so far:
Why was Emiliano Zapata under pressure?
A movement within the Zapatista ranks led by former General Vazquez and Zapata's erstwhile adviser and inspiration Otilio Montano moved against the Tlaltizapan headquarters.

Question: What was their purpose?
Self-contained rewrite: What was the purpose of the movement within the Zapatista ranks led by former General Vazquez ?