278 ACR

The 278th Armored Cavalry Regiment (278th ACR), also known as the "Volunteer Regiment," is a unit of the Tennessee Army National Guard with a distinguished lineage dating back to 1887. Originally organized as a cavalry unit, it has served in various capacities, including as infantry and armor, participating in major conflicts such as World War I, World War II, and Operation Iraqi Freedom. The regiment was redesignated as the 278th Armored Cavalry Regiment in 1977, specializing in reconnaissance, security, and armored warfare. Headquartered in Knoxville, Tennessee, the 278th ACR continues to serve as a key component of the National Guard, upholding its motto "I Volunteer, Sir!"