Era
20th century
24
20th century --
17
Civil War, 1861-1865
12
21st century
11
19th century --
9
1945-
8
18th century
7
19th century
7
2000-
6
1989-
5
1856-1939
4
1945-1989
4
1991-
4
2002-
4
1749-1832
3
1875-1961
3
1980-
3
1998-
3
1759-1805
2
1783-1865
2
17th century
2
1809-1882
2
1859-1952
2
1896-1934
2
18th century --
2
1908-1973
2
1913-1994
2
1918-1945
2
1929-
2
1960-
2
1970-
2
1976-2002
2
1997-
2
19th centur --
2
2001-2009
2
2008 --
2
21st century --
2
1469-152
1
1469-1527
1
1472-1553
1
1485?-1540
1
1509-1547
1
1564-1616
1
1648-1789
1
1689-1755
1
16th century
1
16th century --
1
1735-18
1
1736-181
1
1744-18
1
more ...