Era
1775-1783
24
Revolution, 1775-1783
20
1914-1918
15
1918-1945
14
20th century
14
1861-1865
12
1789-1809
11
1797-1801
11
18th century
11
1801-1809
9
1913-1921
8
1775-1783 (Révolution)
7
1789-1797
7
Civil War, 1861-1865
7
1783-1815
6
1900-1999
6
1939-1945
6
1706-1790
5
1783-1809
5
1821-1861
4
1871-1918
4
1882-1945
4
18e siècle
4
1900-1945
4
1933-1945
4
1938-1945
4
1945-1992
4
19th century
4
Revolution, 1789-1799
4
War of 1812
4
1648-1714
3
1732-1799
3
1759-1817
3
1789-1815
3
1800-1874
3
1801-1815
3
1806-1876
3
1812-1815
3
1860-1941
3
1861-1867
3
1918-1938
3
1979-
3
Since 1979
3
(1860-1941)
2
(1881-1943)
2
-1888
2
-1893
2
1516-1830
2
1533-1603
2
1558-1603
2
more ...