51
modern
× 3 |
8
toponymy
|
0
law
× 2 |
0
public-health
|
43
political-history
× 2 |
8
islam
|
0
us-constitution
× 2 |
0
confederacy
|
43
international-relations
× 2 |
8
north-america
|
0
19th-century
× 2 |
0
border
|
40
orthodoxism
|
8
race
|
0
18th-century
|
0
american-civil-war
|
13
government
× 2 |
8
civil-rights
|
0
crime
|
0
education
|
12
language
× 3 |
7
assimilation
|
0
slavery
|
0
labour-history
|
11
religion
× 2 |
5
election
|
0
justice
|
0
colonial-america
|
9
20th-century
|
5
travel
|
0
science
|
0
employment
|
8
ancient-history
× 2 |
5
immigration
|
0
engineering
|
0
economy
|
8
world-war-two
|
4
united-states
× 5 |
0
secrecy
|
0
academics
|
8
britain
|
4
military
× 2 |
0
gold
|
|
8
agriculture
|
3
tradition
|
0
epidemics
|
|
8
animals
|
3
cultural-history
|
0
health
|