Era
1945-
32
1989-
17
20th century
17
18th century
12
21st century
10
1918-1945
8
19th century
8
1945-1953
7
1992-2010
7
Revolution, 1775-1783
7
1945-1989
5
Since 1945
5
1700-1799
4
1810-
4
1871-1918
4
2000-2099
4
Civil War, 1861-1865
4
Since 1989
4
1775-1783
3
1945-1990
3
1946-
3
1990-
3
2001-2009
3
Since 1800
3
Unification, 1990
3
1789-1900
2
1815-1848
2
1815-1861
2
1874-1965
2
1900-1999
2
1933-1945
2
1945-1955
2
1981-1989
2
1981-1993
2
1991-
2
To 1775
2
1517-1648
1
1517-1837
1
1648-1715
1
1648-1789
1
1660-1714
1
1700-1999
1
1714-1837
1
1732-1799
1
1732-1811
1
1741?-1803
1
1760-1789
1
1775-1783 (Revolution)
1
1789-1797
1
1797-1801
1
more ...