Era
18th century
19
20th century
15
1945-
14
19th century
14
Revolution, 1775-1783
11
1900-1999
10
1800-1837
5
Colonial period, ca. 1600-1775
5
Early 19th century
5
1760-1789
4
1809-1865
4
1918-1945
4
1945-1980
4
Civil War, 1861-1865
4
1783-1850
3
1933-1945
3
1945-1991
3
1973-
3
1979-
3
1980-
3
1809-1817
2
1819-1892
2
1837-1901
2
1892-1984
2
1898-1946
2
1914-
2
1931-1939
2
1934-
2
1939-1945
2
1939-1975
2
1948-
2
1975-
2
Occupation, 1939-1945
2
Since 1931
2
Since 1934
2
Since 1945
2
1473-1543
1
1489-1561
1
1648-1789
1
1656-1680
1
1706-1790
1
1714-1738
1
1714-1837
1
1756-1836
1
1760-1820
1
1762-1878
1
1775-1783
1
1780-1791
1
1781-1869
1
1783-1865
1
more ...