Era
20th century
28
19th century
5
21st century
3
Civil War, 1861-1865
3
1564-1616
2
18th century
2
1900-1999 (20th century)
2
Colonial period, ca. 1600-1775
2
Early modern, 1500-1700
2
1783-1850
1
17th century
1
1830-1886
1
1831-1881
1
1835-1910
1
1856-1924
1
1897-1962
1
1899-1961
1
1934-2024
1
1985-1991
1
Cenozoic
1
Mesozoic
1
Revolution, 1775-1783
1
Revolutionary period, 1775-1783
1
To 1700
1