Era
20th century
16
19th century
14
21st century
9
2001-2009
5
18th century
3
17th century
2
1929
2
1971-
2
1982-
2
1989-
2
2009-
2
-1922
1
1871-1900
1
1880
1
1882-1945
1
1895-1970
1
1900-1995
1
1908-
1
1910-1946
1
1911-
1
1917-
1
1918-
1
1925-
1
1933-1945
1
1939-
1
1940-
1
1941-
1
1948-
1
1950-
1
1952-
1
1959-1990
1
1960-
1
1963-
1
1968-
1
1970-
1
1976-2002
1
1980-2020
1
1985-
1
1992-
1
Civil War, 2011-
1
To 1863
1
To 1865
1