From 1947 until 1951, the 1st Infantry Division was the sole U.S. division in Germany, although the various Constabulary units taken together were equivalent in size to another division. U.S. Army forces in Germany were increased in 1951 as a result of President Truman's 10 December 1950 declaration of a national emergency as a result of the Korean War, with four divisions arriving from CONUS. This included the 4th Infantry Division, which was stationed in the Frankfurt area, and the 2nd Armored Division, which was located with its headquarters at Bad Kreuznach to the west of the Rhine River; both of those were the divisions assigned to the newly activated V Corps. Within six years, unit changes resulted in the arrival (May/June 1956) and stationing of the 3rd Armored Division (3rd AD) around Frankfurt, and the December 1957 arrival of the 8th Infantry Division (Mechanized) (8th ID) in the Bad Kreuznach area. The two replaced divisions returned to the United States.