What was the name of the 1915 battle in the Bajio region where Alvaro Obregon's Constitutionalist forces, using European trench-warfare tactics and machine guns, decisively defeated Pancho Villa's cavalry charges?

• A Battle of Zacatecas
• B Battle of Torreon
• C Battle of Celaya ✓
• D Battle of Ojinaga

Obregon lost his right arm at Celaya but destroyed Villa's Division del Norte in a two-part battle, marking the end of cavalry as a dominant military force in the region.