Era
20th century
149
Civil War, 1861-1865
123
19th century
85
World War, 1939-1945
76
21st century
51
1866-1895
32
1839-1876
23
1890-1969
12
1880-1959
10
Korean War, 1950-1953
10
1822-1885
9
1945-1955
9
Vietnam War, 1961-1975
9
World War, 1914-1918
9
Iraq War, 2003-2011
8
1862-1865
7
1880-1964
7
1815-1875
6
1820-1891
6
Revolution, 1775-1783
6
1821-1894
5
1848-
5
2001-
5
Afghan War, 2001-
5
Japanese occupation, 1942-1945
5
Persian Gulf War, 1991
5
1809-1865
4
1829-1890
4
1848-1860
4
1860-1890
4
1885-1945
4
1919-1992
4
1933-1945
4
2003-
4
War of 1812
4
1774-1826
3
1807-1870
3
1826-1885
3
1889-1977
3
1896-1993
3
18th century
3
1918-1945
3
1989-
3
2001-2021
3
Allied intervention, 1918-1920
3
German occupation, 1940-1945
3
Mexican War, 1846-1848
3
Punitive Expedition into Mexico, 1916
3
Revolution, 1910-1920
3
To 1900
3
more ...