Era
19th century
43
20th century
16
1812-1870
14
1564-1616
12
1800-1899
12
18th century
9
Civil War, 1861-1865
8
1900-1999
6
1819-1880
5
1911-1983
5
1754-1817
4
1764-1793
4
1800 - 1899
4
1933-1945
4
1939-1945
4
21st century
4
Revolution, 1917-1921
4
1750-1825
3
1756-1791
3
1760-
3
1847-1912
3
1856-1919
3
1865-1936
3
1883-1945
3
1887-1964
3
1889-1945
3
1890-1960
3
1892-1973
3
1892-1977
3
1899-1961
3
1946-
3
1947-
3
1949-
3
1977-
3
British occupation, 1765-1947
3
Revolution, 1905-1907
3
-1542
2
1485-1536
2
1491-1547
2
1507-1536
2
1509?-1537
2
1512-1548
2
1515-1557
2
1533-1603
2
1700-1799
2
1760-1789
2
1763-1842
2
1775-1817
2
1811-1863
2
1818-1848
2
more ...