Era
Civil War, 1861-1865
28
20th century
11
Revolution, 1775-1783
6
1866-1895
5
21st century
4
1888-1935
3
19th century
3
1783-1789
2
17th century
2
1822-1893
2
1839-1876
2
1895-
2
1922-2004
2
1976-2004
2
Soviet occupation, 1979-1989
2
-1621
1
-1867
1
-1898
1
-1913
1
-1994
1
1066-1485
1
1328-1589
1
1336-1407
1
1378?-1459
1
1412-1431
1
1563-1626
1
1564-1616
1
16th century
1
1738-1789
1
1754-1782
1
1755-1828
1
1756-1836
1
1757-1804
1
1757-1854
1
1760-1850
1
1762-1833
1
1775-1865
1
1783-1865
1
1788-1864
1
1805-1866
1
1809-1836
1
1809-1868
1
1817-1874
1
1822-1901
1
1823-1911
1
1824?-1881
1
1827?-1908
1
1828-
1
1828-1864
1
1830-1894
1
more ...