Era
Colonial period, ca. 1600-1775
15
1869-1934
5
20th century
5
Civil War, 1861-1865
4
1979-
3
Since 1979
3
1898-1946
2
1900-1999
2
1931-1939
2
1934-
2
1939-1945
2
1939-1975
2
1975-
2
Since 1931
2
Since 1934
2
1600-1699
1
1656-1680
1
1760-1789
1
17th century
1
1809-1865
1
1812-1815
1
1825-1829
1
1848-1920
1
1863-1933
1
1866-1895
1
1873
1
18th century
1
1908-1982
1
1914-
1
1918-1945
1
1973-
1
1979-1990
1
1980-
1
1993-
1
1993-2001
1
Geschichte
1
Revolution, 1775-1783
1
War of 1812
1
approximately 1842-1877
1