Era
20th century
10
1945-
3
1960-1980
3
1980-2020
3
18th century
2
19th century
2
2009-
2
21st century
2
To 1865
2
1736-1818
1
1783-1850
1
17th century
1
1865-1918
1
1888-1969
1
1917-1963
1
1918-1932
1
1929
1
1933-1945
1
1941
1
1993-
1
Civil War, 1861-1865
1
Colonial period, ca. 1600-1775
1
Revolution, 1775-1783
1
Revolutionary period, 1775-1783
1
To 1775
1