Era
19th century
21
20th century
16
1741-1827
9
Civil War, 1861-1865
8
1856-1930
7
18th century
7
1809-1865
6
1959-
6
1732-1799
5
19e siècle
5
Revolution, 1775-1783
5
1963-
4
1775-1783
3
1840-1917
3
1844-1916
3
1872-1951
3
20e siècle
3
1644-1718
2
1738-1820
2
1782-1844
2
1791-1868
2
1795-1872
2
1797-1879
2
1799-1888
2
17th century
2
1800-1899
2
1800-1999
2
1802-1873
2
1863-
2
1882-1945
2
1890-1969
2
1917-
2
1939-
2
1946-
2
Colonial period, ca. 1600-1775
2
French and Indian War, 1754-1763
2
Pennsylvania
2
Revolution
2
-2021
1
1368-1912
1
1514-1589
1
1564-1642
1
1595-1617
1
1600-1775
1
1606-1669
1
1629-1696
1
1695-1746
1
1700-1780
1
1700-1799
1
1740-1820
1
more ...