Era
20th century
25
World War, 1939-1945
21
19th century
6
Korean War, 1950-1953
5
Revolution, 1775-1783
4
21st century
3
Civil War, 1861-1865
3
German occupation, 1943-1945
3
Japanese occupation, 1942-1945
3
Vietnam War, 1961-1975
3
1893-1981
2
18th century
2
1945-1975
2
American Invasion, 1983
2
American Invasion, 1989
2
Persian Gulf War, 1991
2
World War, 1914-1918
2
1723-1790
1
1735-1819
1
1741-1811
1
1741-1819
1
1744-1800
1
1744-1822
1
1745-1790
1
1746-1825
1
1748-1828
1
1752-1816
1
1754-1807
1
1755-1814
1
1755-1827
1
1757-1804
1
1757-1824
1
1758-1802
1
1759-1828
1
1760-1824
1
1783-1789
1
1783-1815
1
1783-1865
1
1880-1964
1
1890-1969
1
1896-1984
1
1904-
1
1912-1945
1
1914-1994
1
1918-2003
1
1919-1992
1
1939-
1
1939-1945
1
1945-1955
1
1945-1989
1
more ...