Era
War of 1812
52
Revolution, 1775-1783
33
1939-1945
30
Civil War, 1861-1865
20
20th century
17
2003-2011
16
1945-
13
1914-1918
11
1939 - 1945
10
1939-1951
9
1650-1722
7
1900-1999
7
Since 1945
7
21st century
6
1939 - 1951
5
1945-1989
5
Since 2001
4
1701 - 1714
3
1748-1834
3
1751-1823
3
1756-1846
3
1914 - 1918
3
1981-2001
3
19th century
3
Since 1900
3
1760-1823
2
1765-1825
2
1773-1841
2
1779-1830
2
1785-1826
2
1816-1894
2
1900-2099
2
1911-1921
2
1918-
2
1918-1945
2
1961-
2
1981 - 2001
2
1981-1989
2
2001-
2
2001-2021
2
2003 - 2011
2
2013
2
Appropriations and expenditures, 2013
2
Since 1961
2
-1822
1
1700 - 1899
1
1700-1899
1
1775 - 1783
1
1775-1783
1
1789-1820
1
more ...