Unit 4: 1914-Present

Main

July 28, 1914 - November 11, 1918
February 1917 - October 1917
March 12, 1930 - April 1930
October 1934 - October 1935
November 1, 1939 - August 15, 1945
1945 - 1960
1947
1948 - 1990
August 13, 1961 - November 9, 1989
1966 - 1976
January 1978 - February 1979