Era
20th century
59
19th century
36
Civil War, 1861-1865
25
18th century
21
World War, 1914-1918
6
1779-1869
5
1780-1831
5
World War, 1939-1945
5
1789-1815
4
1891-1944
4
21st century
4
Soviet occupation, 1979-1989
4
-480 B.C.
3
1769-1821
3
17th century
3
1833-1916
3
1939-1945
3
Revolution, 1775-1783
3
1712-1786
2
1807-1870, USMA 1829
2
1814-1879, USMA 1837
2
1820-1891, USMA 1840
2
1822-1885, USMA 1843
2
1824-1863, USMA 1846
2
1826-1885, USMA 1846
2
1833-1864, USMA 1854
2
1833-1913
2
1837-1861
2
1851-1929
2
1861-1865
2
1861-1865 (Guerre de Sécession)
2
1900-1999
2
1919-1992
2
1971-
2
20e siècle
2
519 B.C.-465 B.C. or 464 B.C.
2
527-1081
2
Medieval, 500-1500
2
Messenian Wars, 735-460 B.C.
2
Persian Wars, 500-449 B.C.
2
Revolution, 1789-1799
2
To 1500
2
To 500
2
Vietnam War, 1961-1975
2
-1349?
1
14th century
1
16th century
1
1700-1899
1
1719-1780
1
1729-1799
1
more ...