The 1st Battalion, 28th Infantry Regiment, known as "Black Lions," was first constituted in 1901 and has served with distinction in multiple conflicts. The unit gained particular renown during the Vietnam War, where it was part of the 1st Infantry Division and saw heavy action, most notably during the Battle of Ong Thanh in 1967. Throughout its history, the 1/28th Infantry has participated in World War I, World War II, Vietnam, and the Global War on Terrorism. The battalion is recognized for its bravery, resilience, and dedication to mission, upholding the proud traditions of the “Big Red One.”