It was July 15, 1862, and Union Captain Thomas Roberts led a column of volunteers into Apache Pass in southeast Arizona. They were headed to New Mexico to fight Confederates. They were in for a surprise. Some 500 Apache warriors, led by Mangas Coloradas and Cochise ambushed them. Over the next two days, the fighting was fierce and there were casualties on both sides.
The army final drove off the Indians by opening up with artillery. But it was just one fight; the war lasted about 10 years before Cochise signed a peace treaty.