Era
20th century
116
Revolution, 1917-1921
77
1945-1991
73
1953-1985
64
1985-1991
59
1878-1953
50
1917-1936
44
1945-1989
43
1936-1953
40
1917-1945
32
1975-1985
31
1925-1953
21
1931-2022
21
1894-1971
18
1970-1991
18
1953-1975
17
1870-1924
16
German occupation, 1941-1944
15
1933-1945
13
1945-
13
1991-
13
Nicholas II, 1894-1917
13
1801-1917
11
1945-1953
10
1981-1989
9
1989-
8
19th century
8
1889-1945
7
1894-1917
7
1939-1945
7
1945-1955
7
Soviet occupation, 1979-1989
7
1882-1945
6
1906-1982
6
1986-1991
6
1917-1963
5
1918-1945
5
1928-1932
5
1955-1965
5
1965-1975
5
Intervention, 1968
5
1879-1940
4
1891-1953
4
1913-1994
4
1945-1990
4
1949-1976
4
1981-1985
4
1985-1995
4
Allied intervention, 1918-1920
4
February Revolution, 1917
4
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