Era
19th century
4
1912-1949
2
20th century
2
Civil War, 1861-1865
2
1564-1616
1
1775-1817
1
1800 - 1899
1
1832-1888
1
1837-1863
1
1862-1937
1
1869-1948
1
1871-1958
1
1888-1935
1
1900-1999
1
1904-1981
1
1912-1994
1
1912-1999
1
1918-1945
1
1919-1947
1
1924-1966
1
1948-
1
259 B.C.-210 B.C.
1
Qin dynasty, 221-207 B.C.
1
Siglo XX
1