180th Infantry Regiment Branch - Oklahoma Warriors - US Army X 300 Classic License PlateType: Classic Metal License Plate New, 12" X 6". The 1st Squadron, 180th Cavalry Regiment is a formation of the United States Army, headquartered in McAlester, Oklahoma. It is a part of the 45th Infantry Brigade Combat Team, Oklahoma Army National Guard and is one of the oldest units in the brigade. The 180th Infantry Regiment (redesignated to Cavalry in 2008) saw action during World War I as the 142nd Infantry Regiment of the 36th Infantry Division