Era
Civil War, 1861-1865
244
1914-1918
121
1861-1865
94
1939-1945
90
20th century
73
19th century
68
1914 - 1918
54
1939 - 1945
50
1861 - 1865
49
1900-1999
35
1769-1821
19
1800-1899
18
1888-1935
15
French occupation, 1798-1801
14
Revolution, 1775-1783
14
1861-1865 (Guerre de Sécession)
13
War of 1812
13
1789-1815
11
1800-1815
11
1807-1870
10
18th century
10
1775-1783
9
1890-1969
9
Revolution, 1789-1799
9
1900 - 1999
8
1900-1942
8
1798-1801
7
1820-1891
7
1822-1885
7
1826-1885
7
1861-1865 (Guerre de Sécession)
7
1800 - 1815
6
1800 - 1899
6
1952
6
1953-1961
6
Civil War, 1936-1939
6
World War, 1939-1945
6
1753-1800
5
1834-1896
5
1883-1963
5
1914-1945
5
1914-1985
5
1921-
5
German occupation, 1940-1945
5
Siege, 1863
5
Siege, 1864-1865
5
World War, 1914-1918
5
1732-1799
4
1760-
4
1768-1857
4
more ...