横向
1
Government elected by the people
5
Fortified medieval residence
6
Handwritten historical document
7
Practice of establishing foreign colonies
8
Exchange of goods between peoples
10
Person who travels to discover new lands
11
Formal agreement between nations
纵向
2
Medieval land-for-service system
3
Advanced stage of human society
4
Union formed for mutual benefit
9
Military blockade of a fortified place