Era
1991-
152
1952-
40
20th century
39
21st century
34
2016
27
1946-
11
1989-
11
Civil War, 1994-
10
1985-1991
7
Civil War, 2011-
6
1931-2007
5
19th century
5
2017-2021
4
Revolution, 1917-1921
4
Russian occupation, 2014-
4
1870-1924
3
1872-1929
3
1879-1953
3
1881-1931
3
1887-1985
3
1894-1917
3
18th century
3
1965-
3
1993-2001
3
2000-
3
2002-
3
Precambrian
3
1689-1801
2
1866-1944
2
1874-1965
2
1882-1945
2
1963-
2
1976-2000
2
1980-
2
1992-
2
Nicholas II, 1894-1917
2
Pleistocene
2
Revolution of Dignity, 2013-2014
2
Siege, 1941-1944
2
1530-1584
1
1533-1917
1
1613-1917
1
1672-1725
1
1707-1783
1
1744-1818
1
1796-1855
1
1801-1917
1
1825-1855
1
1828-1910
1
1834-1907
1
more ...