Era
20th century
10
1917-2014
7
19th century
5
21st century
5
1800-1999
3
1979-
3
2000-2099
3
2019
3
Appropriations and expenditures, 2019
3
Since 1979
3
1900-1999
2
1564-1616
1
1914-1918
1
1933-1945
1
1933-1953
1
1939-1945
1
1949-
1
1954-
1
1956-
1
1957-
1
1991-
1
1993-2001
1
2003-2011
1
2017-
1
2020
1
Appropriations and expenditures, 2018
1
Geschichte 1961-2008
1
Geschichte 2000-2100
1
Since 1949
1
Since 2020
1
World War, 1939-1945
1
active 1988-2013
1