Era
21st century
37
2001-2009
17
2001-
13
1957-2011
8
20th century
6
1946-
3
2003-
3
2009-
3
1942-
2
2009-2017
2
Iraq War, 2003-2011
2
1932-2009
1
1936-2018
1
1945-
1
1955-
1
1960-
1
1986-
1
1995-2005
1
2008
1
2016
1
2017-2021
1
Afghan War, 2001-
1
American occupation, 1915-1934
1
Civil War, 2011-
1
Mau Mau Emergency, 1952-1960
1
Philippine American War, 1899-1902
1
War on Terrorism, 2001-2009
1