Era
1961-1997
14
20th century
12
19th century
9
16th century
5
1533-1603
4
1901-1918
4
1930-2002
4
Civil War, 1861-1865
4
1516-1558
3
1564-1616
3
1840-1912
3
1846-1921
3
18th century
3
1900-1999
3
1926-
3
1982-
3
Empire, 1822-1889
3
1328-1385
2
1421-1737
2
1434-1737
2
1542-1576
2
1596-1662
2
1637-1864
2
1735-1815
2
1793-1870
2
1800-1899
2
1875-1899
2
1929-1982
2
1958-
2
1981-
2
1984-
2
2000-2020
2
Edward III, 1327-1377
2
European intervention, 1861-1867
2
Nicholas II, 1894-1917
2
Revolution, 1917-1921
2
-30 B.C.
1
10th century
1
1288-1918
1
12th century
1
1327-1377
1
1482-1648
1
1500-1599
1
1582-1663
1
15th century
1
1600-1699
1
1602-1651
1
1618-1680
1
1622-1709
1
1630-1714
1
more ...