Era
Civil War, 1861-1865
851
20th century
435
19th century
370
1939-1945
204
1861-1865
169
1900-1999
164
1800-1899
141
World War, 1939-1945
129
21st century
78
1939 - 1945
45
1914-1918
44
1866-1895
42
1839-1876
34
Revolution, 1775-1783
33
War of 1812
32
World War, 1914-1918
27
1822-1885
26
1820-1891
22
1880-1964
21
Vietnam War, 1961-1975
21
1885-1945
20
1961-1975
20
2003-2011
19
1860-1890
18
1890-1969
18
2000-2099
18
1933-1945
16
To 1900
16
1809-1865
15
1826-1885
15
1860-1948
15
Punitive Expedition into Mexico, 1916
15
1880-1959
14
1950-1953
14
1807-1870
13
Mexican War, 1846-1848
13
1732-1799
12
Korean War, 1950-1953
12
1914 - 1918
11
1815-1875
10
1828-1914
10
1858-1919
10
Civil war, 1861-1865
10
18th century
9
1917-2014
9
1945-1955
9
1767-1845
8
1800-1999
8
1918-1945
8
1924-
8
more ...