Era
Revolution, 1775-1783
536
Civil War, 1861-1865
469
1775-1783
297
20th century
235
1914-1918
229
21st century
183
2009-
168
19th century
162
2001-2009
152
1918-1945
137
1861-1865
135
1939-1945
126
War of 1812
118
1861 - 1865
99
1900-1999
94
1981-2001
83
1945-
81
18th century
80
2000-2099
79
Since 2009
64
1775 - 1783
63
2009-2017
63
1914 - 1918
60
1971-1981
59
Appropriations and expenditures, 2019
59
To 1789
57
1981-
55
To 1865
55
1812-1815
53
2015
52
1939 - 1945
51
2016
50
Appropriations and expenditures, 2018
50
1933-1945
49
1901-1933
45
2017
45
1800-1899
43
1814
43
1861-1875
43
2019
42
Appropriations and expenditures, 2017
40
1900 - 1999
39
2005
38
2014
38
2008-2009
36
2012
36
2013
36
1760-1789
35
2020
35
2001
32
more ...