Era
20th century
3
1900-1999
2
1939-1945
2
19th century
2
2016
2
Nicholas II, 1894-1917
2
10th century
1
1412-1431
1
1743-1803
1
1760-1899
1
1800-1899
1
1843-1915
1
1861-1865 (Guerre de Sécession)
1
1861-1865, Civil War
1
1894-1921
1
1898-1951
1
1901-1918
1
1925-1965
1
1933-1945
1
1950-
1
2000-2099
1
2010
1
2011
1
2013
1
2015
1
2019
1
900-999
1
Civil War, 1861-1865
1
George III, 1760-1820
1
Occupation, 1939-1945
1
Revolution, 1791-1804
1
Revolution, 1917-1921
1
To 1964
1
Warsaw Ghetto Uprising, 1943
1