横向
1
Relating to the Middle Ages
5
Person who travels to discover new lands
6
Advanced stage of human society
7
Union formed for mutual benefit
8
Formal agreement between nations
13
Medieval land-for-service system
纵向
2
Government elected by the people
3
Freedom from outside control
4
Armed conflict between nations
9
Legislative assembly of a country
10
Ancient Mesoamerican civilization
11
Practice of establishing foreign colonies
12
Movement of people to new areas
14
Territory controlled by another country