Era
20th century
129
19th century
91
1900-1999
54
To 1500
33
21st century
22
1800-1899
17
2000-2099
13
17th century
12
1800-1999
10
1898-1951
8
18th century
8
1925-1953
7
Civil War, 1861-1865
7
16th century
6
1945-
6
1980-
6
1865-1898
5
1947-
5
2000-
5
To 476
5
1867-1931
4
1971-
4
Medieval, 500-1500
4
Republic, 265-30 B.C.
4
1775-1865
3
1865-1918
3
1882-1941
3
1904 March 17-1962
3
1973-
3
19e siècle
3
Peloponnesian War, 431-404 B.C.
3
To 1898
3
146 B.C.-323 A.D.
2
1503-1734
2
1508-1797
2
1600-1699
2
1700-1799
2
1775?-1824
2
1783-1850
2
1783-1859
2
1787-1824
2
1789-1900
2
1789-1945
2
1863-1877
2
1865-1951
2
1875-
2
1898-1959
2
1898-1973
2
1900 - 1999
2
1901-1991
2
more ...