Conversation so far:
When did Emiliano Zapata die?
On April 10, 1919.
What caused his death?
when Zapata arrived at the Hacienda de San Juan, in Chinameca, Ayala municipality, Guajardo's men riddled him with bullets.

Question: Why were they able to catch up to him?
Self-contained rewrite: Why were Guajardo's men able to catch up to Emiliano Zappato?