Era
20th century
177
1900-1999
38
20e siècle
38
19th century
37
Civil War, 1861-1865
34
Revolution, 1775-1783
20
1945-
15
1835-1919
14
1950-
14
21st century
14
1865-1947
13
18th century
12
1970-
12
1929-1994
11
1783-1865
10
1895-1990
9
1848-1892
8
1879-1962
8
1903-
8
1905-1976
8
1863-1947
7
Colonial period, ca. 1600-1775
7
1945-1989
6
1946-
6
19e siècle
6
1763-1848
5
1838-1918
5
1892-1941
5
1892-1981
5
1917-2002
5
1933-1945
5
1953-
5
Since 1945
5
-1977
4
1842-1910
4
1843-1885
4
1843-1916
4
1865-1918
4
1921-
4
1924-
4
1980-2020
4
Civil War, 1944-1949
4
War of 1812
4
1794-1877
3
1800-1899
3
1811-1882
3
1836-1892
3
1839-1937
3
1865-1950
3
1870-1957
3
more ...