Conversation so far:
What happened at the battle of Zacatecas?
Pancho Villa's victory at the battle of Zacatecas in June 1914 broke the back of the Huerta regime.
How did Pancho Villa break the back of the Huerta regime?
After Pancho Villa's victory at Zacatecas in June 1914, Huerta left the country on 14 July 1914. The Federal Army collapsed, ceasing to exist as an institution.

Question: Were there many casuealties?
Self-contained rewrite: Were there many casualties at the Battle of Zacatecas in 1914?