"Horse Soldiers" refers to a group of U.S. Special Forces soldiers who were deployed to Afghanistan shortly after the September 11 attacks in 2001. Their mission was to assist the Northern Alliance in overthrowing the Taliban regime. Utilizing their skills in unconventional warfare, these soldiers rode horses into battle, forming a unique partnership with local Afghan fighters. The term gained popularity due to the book "Horse Soldiers" by Doug Stanton, which chronicles their experiences. The story highlights the bravery and adaptability of these soldiers, as well as the importance of U.S. military collaboration with Afghan forces during the early stages of the War in Afghanistan.