Historical Period
20th century
93
19th century
41
21st century
20
18th century
19
1918-1945
15
1945-
12
1980-2020
7
2000-
7
1990-
5
17th century
4
1900-1999
4
1970-
4
1810-
3
1943-1955
3
1945-1983
3
To 1500
3
Unification, 1990
3
16th century
2
1819-1900
2
1830-1915
2
1867-1910
2
1910-1946
2
1917-1970
2
1919-1952
2
1945-1964
2
1945-1989
2
1946-1970
2
1971-1981
2
1981-2001
2
1997-
2
2001-2009
2
Medieval, 500-1500
2
Revolution, 1775-1783
2
Revolution, 1952
2
Vietnam War, 1961-1975
2
1585-1656
1
1600-1699
1
1700-1799
1
1745-1808
1
1766-1834
1
1800-1999
1
1824-1948
1
1858-1940
1
1865-1918
1
1868-1963
1
1874-1964
1
1894-1971
1
1895-1970
1
1913-1994
1
1914-1940
1
more ...