Era
19th century
179
20th century
96
1939-1945
91
1918
67
1917
39
1914
15
1891
14
1914-1918
14
1945
13
Nineteen tens
13
1912
10
1946
10
Civil War, 1861-1865
10
1877
8
1887
8
1894
8
1911
8
1913
8
1915
8
1944
8
1899
7
1906
7
1919
7
Nineteen hundreds (Decade)
7
1884
6
1890
6
1892
6
1896
6
1901
6
1903
6
1909
6
1949
6
1800-1899
5
1886
5
1907
5
1908
5
1910
5
1916
5
1963
5
1984
5
17th century
4
1870
4
1880-1890
4
1882-1941
4
1885
4
1889
4
1895
4
1897
4
1900
4
1905
4
more ...