Era
Civil War, 1861-1865
139
Revolution, 1775-1783
107
1775-1783
26
Revolution
24
1775-1783 (Révolution)
21
1939-1945
21
Civil War
17
1914-1918
14
19th century
13
French and Indian War, 1755-1763
10
1861-1865
9
War of 1812
9
1861-1865 (Guerre de Sécession)
8
Civil war
8
War with Mexico, 1845-1848
6
1783-1848
5
20th century
5
French and Indian War, 1754-1763
5
Revolution, 1917-1921
5
1899-1902
4
18th century
4
Revolution, 1789-1799
4
1729-1814
3
1732-1799
3
1741-1801
3
1750-1815
3
1775-1865
3
1783-1809
3
1841-1864
3
1917-1921
3
Occupation, 1939-1945
3
1729-1823
2
1754-1763 (Guerre de Sept Ans)
2
1756-1836
2
1760-1837
2
1789-1799
2
1790-1794
2
1802-1868
2
1815-1875
2
1833-1906
2
1836-1918
2
1837-1906
2
1837-1914
2
1861 - 1865
2
1865-
2
1867-1950
2
1883-1969
2
1900-1999
2
1917-
2
1923-1998
2
more ...