Era
Revolution, 1775-1783
55
20th century
39
Revolution
33
19th century
32
Civil War, 1861-1865
31
1939-1945
26
Colonial period, ca. 1600-1775
23
1900-1999
21
1917-1921
18
Revolution, 1917-1921
18
20e siècle
17
1914-1918
11
1732-1799
10
1800-1899
10
20th cent
10
1775-1783
9
1861-1865
9
To 987
9
1706-1790
8
18th century
8
1848
7
Civil War
7
To 1648
7
War of 1812
7
1600-1775
6
1618-1648
6
1648-1654
6
1648-1668
6
1756-1836
6
1782-1865
6
1809-1865
6
1917-1921 (Révolution)
6
John II Casimir, 1648-1668
6
ca 1600-1775 (Période coloniale)
6
1412-1431
5
1865-1877
5
1933-1945
5
19e siècle
5
1741-1801
4
1751-1780
4
1812-1815
4
1929
4
German occupation, 1940-1945
4
Primitive and early church, ca. 30-600
4
Revolution, 1789-1799
4
Revolution, 1835-1836
4
To 1863
4
-1467?
3
-1635
3
-453
3
more ...