横向
1
Movement of people to new areas
5
Freedom from outside control
6
Military blockade of a fortified place
10
Legislative body in ancient Rome
11
Advanced stage of human society
纵向
2
Person who travels to discover new lands
3
Fundamental law of a nation
4
Ancient empire that conquered much of Europe
7
Uprising against authority
8
Medieval land-for-service system
9
Formal agreement between nations