Era
Revolution, 1917-1921
30
1917-1945
27
1917-1936
22
1917-1921
17
1917-
13
20th century
13
1945-1991
11
1939-1945
10
1945-
10
1936-1953
7
1953-1985
7
Allied intervention, 1918-1920
7
1870-1924
5
1917-1921 (Révolution)
5
Since 1917
5
1900-1999
4
1854-1938
3
1878-1953
3
1918-1945
3
1925-1953
3
1945-1989
3
20e siècle
3
1883-1977
2
1914-1918
2
1914-1920
2
1917-1920
2
1917-1970
2
1918-1920
2
1918-1920 (Intervention alliée)
2
1918-1938
2
1921-1944
2
1921-1953
2
1933-1945
2
1939 - 1991
2
1939-1945 (Occupation)
2
1945-1955
2
1959-1965
2
1966-1970
2
19th century
2
Nicholas II, 1894-1917
2
Occupation, 1939-1945
2
Revolution, 1917-1920
2
Since 1945
2
approximately 956-1015
2
-1911
1
1743-1811
1
1767-1848
1
1775-1783
1
1792-1881
1
1814-1876
1
more ...