When a group of U.S. Marines fighting in the Korean War found a bedraggled little mare, they wondered if she could be trained as a packhorse. They had no idea that the skinny, underfed horse had one of the biggest and bravest hearts they’d ever know. And one of the biggest appetites!

Soon she showed herself more than willing to carry ammunition too heavy for the soldiers to haul. As cannons thundered and shells flew through the air, she marched into battle—again and again—becoming the only animal to ever officially hold military rank and receive two Purple Hearts.