Historical Period
20th century
2,507
19th century
1,302
21st century
581
Civil War, 1861-1865
432
18th century
385
To 1500
220
1945-
168
17th century
114
Revolution, 1775-1783
93
16th century
64
1900-1999
63
1945-1989
60
1989-
59
1933-1945
54
To 1865
44
1865-1918
42
1980-2020
41
1918-1945
38
1970-
36
1980-
32
1993-
32
1800-1899
31
1950-
30
1975-
28
1991-
28
1861-1865
25
1960-
25
Civil War, 1936-1939
25
Medieval, 500-1500
25
2000-2099
24
1960-1980
22
1961-1970
22
2000-
21
Colonial period, ca. 1600-1775
21
1990-
20
1775-1783
19
Revolution, 1789-1799
19
1971-
18
Early modern, 1500-1700
17
To 1775
17
15th century
16
1783-1865
16
1939-1945
16
1945-1991
16
1801-1917
15
1809-1865
15
1865-1950
15
1918-1933
15
1700-1799
14
1775-1865
14
more ...