20th century 51
19th century 38
21st century 13
18th century 8
1929-2018 4
1865- 3
1959- 3
1753-1784 2
1844- 2
1865-1950 2
1874-1958 2
1936?- 2
Civil War, 1861-1865 2
Colonial period, ca. 1600-1775 2
Revolution, 1775-1783 2
-1770 1
-2005 1
1632-1675 1
1696 or 1697-1774 1
1705-1787 1
1727-1759 1
1732-1803 1
1735-1818 1
1742-1840 1
1763-1844 1
1775-1865 1
1790-1849 1
1793-1871 1
17th century 1
1816-1899 1
1822-1903 1
1823-1893 1
1825?-1897 1
1831-1899 1
1833-1893 1
1834-1862 1
1839-1923 1
1841-1904 1
1850?-1933 1
1851-1919 1
1857-1917 1
1857-1950 1
1859-1932 1
1865-1918 1
1865-1959 1
1867-1959 1
1870-1942 1
1871-1951 1
1875-1921 1
1879-1948 1
1888-1953 1
1898-1994 1
1911-2008 1
1914-1997 1
1917-1977 1
1922-1987 1
1929- 1
1930-2008 1
1931- 1
1931-1973 1
1937- 1
1938-2003 1
1940- 1
1948- 1
1950- 1
1954- 1
1958- 1
1960- 1
1960-1980 1
1962- 1
1969-1974 1
1991-2000 1
2011-2020 1
Song-Yuan dynasties, 960-1368 1
To 1865 1
To 640 A.D. 1