How the gunfights in north Mexico that left 23 dead unfolded

When dozens of pickup trucks crowded with armed men and mounted machine guns roared into Villa Union, residents of the small town near the U.S. border began to realize they were the target of a military-style invasion. What followed were prolonged gunbattles between a company-sized unit of cartel gunmen and police that left 23 people dead, and the town’s buildings riddled with bullet holes.