Era
20th century
14
1950-
6
1970-
4
19th century
4
1897-1990
3
1945-
3
1989-
3
1945-1953
2
1980-
2
21st century
2
Civil War, 1861-1865
2
1700-1799
1
1735-1826
1
1743-1826
1
1751-1836
1
1801-1869
1
1860-1910
1
1861-1932
1
1865-1918
1
1889-1975
1
18th century
1
1904-2005
1
1905-1980
1
1907-1998
1
1925-1961
1
1926-1945
1
1929-1968
1
1945-1989
1
1949-
1
2000-
1
Han dynasty, 202 B.C.-220 A.D.
1
Qin dynasty, 221-207 B.C.
1
Since 2000
1