Era
20th century
16
Civil War, 1861-1865
7
1900-1999
4
19th century
3
21st century
3
1800-2099
2
Anglo-Saxon period, 449-1066
2
Civil War, 1936-1939
2
Revolution, 1775-1783
2
1738-1789
1
1754-1763
1
1800-1899
1
1809-1865
1
1861-1865
1
1863
1
1900-2099
1
1914-1918
1
1950-1953
1
2011
1
Anglo Saxon period, 449-1066
1
Civil War, 2011-
1
Elizabeth II, 1952-
1
French and Indian War, 1754-1763
1
To 1791
1
Tripolitan War, 1801-1805
1