Era
20th century
24
21st century
18
19th century
15
2000-2099
11
1980-
10
1865-1950
8
1951-
8
Civil War, 1861-1865
8
1861-1865
7
1946-
5
1865-1877
4
1989-
4
Since 1980
4
1800-1899
3
1800-1999
3
To 1964
3
1847-1918
2
1865-1999
2
1900-1999
2
1961-1975
2
1961-1978
2
2017-2021
2
Since 1865
2
Since 1900
2
1821-1877
1
1845-1861
1
1863-1877
1
1877-1964
1
1889-1945
1
1891-1966
1
1896-1925
1
1900-2099
1
1933-1945
1
1945-1989
1
1950-
1
1953-
1
1961-
1
1961-1994
1
1978-
1
1978-1989
1
2016
1
2017-
1
2020
1
Geschichte 1920-1930
1
Since 2000
1
Since 2017
1