Era
Civil War, 1861-1865
781
20th century
398
19th century
352
1939-1945
173
1861-1865
156
1900-1999
153
1800-1899
137
World War, 1939-1945
127
21st century
68
1939 - 1945
44
1914-1918
42
1866-1895
41
1839-1876
33
World War, 1914-1918
27
Revolution, 1775-1783
26
1822-1885
23
1820-1891
22
1880-1964
20
Vietnam War, 1961-1975
20
1885-1945
19
1961-1975
19
1860-1890
17
1890-1969
17
2000-2099
16
2003-2011
16
War of 1812
16
1826-1885
15
1860-1948
15
Punitive Expedition into Mexico, 1916
15
1950-1953
14
1807-1870
13
1880-1959
13
Mexican War, 1846-1848
13
To 1900
12
1732-1799
11
1809-1865
11
1914 - 1918
11
Korean War, 1950-1953
11
1815-1875
10
1828-1914
10
1858-1919
10
Civil war, 1861-1865
10
1917-2014
9
1933-1945
9
1800-1999
8
1924-
8
Allied intervention, 1918-1920
8
1846-1865
7
1861 - 1865
7
1862-1865
7
more ...