Era
20th century
35
1900-1999
15
19th century
14
21st century
7
2000-2099
4
1800-1899
3
18th century
3
1783-1865
2
17th century
2
1800-1999
2
1865-1918
2
1900-2099
2
Civil War, 1861-1865
2
Colonial period, ca. 1600-1775
2
Revolution, 1775-1783
2
To 1783
2
1700-1899
1
1750-1815
1
1789-1869
1
1815-1875
1
1822-1885
1
1900 - 1999
1
1933-1945
1
1945-
1
1945-1989
1
1946-
1
1960-1980
1
1962-
1
2017-2021
1
To 1865
1
To 1933
1
To 1999
1
World War, 1939-1945
1