Era
20th century
31
21st century
5
1945-1989
3
19th century
3
Civil War, 1861-1865
3
1880-1959
2
Intervention, 1968
2
Persian Gulf War, 1991
2
1775-1865
1
1821-1912
1
1823-1887
1
1863-1877
1
1883-1944
1
1890-1969
1
1907-1998
1
1908-1973
1
1919-1992
1
1930-2004
1
1933-1945
1
1946-
1
1952-
1
1953-1985
1
1963-1969
1
1980-1989
1
1989-
1
2001-2009
1
Vietnam War, 1961-1975
1
World War, 1939-1945
1