Era
1917-1936
Revolution, 1917-1921
5
1917-
3
1878-1953
2
1917-1945
2
1936-1953
2
Since 1917
2
1879-1940
1
1879-1953
1
1917 ****
1
1917 - 1936
1
1917 - 1951
1
1917-1921
1
1917-1921 (Révolution)
1
1917-1932
1
1917-1951
1
1917-1953
1
1925-1953
1
1953-1985
1
20th century
1
Foreign relations, 1918-1923
1
Geschichte 1917
1
Politics, 1918-1923
1