横向
1
Freedom from outside control
9
Medieval land-for-service system
10
Advanced stage of human society
11
Fundamental law of a nation
纵向
2
Person who travels to discover new lands
3
Payment made to show submission
4
Person with no fixed home
5
Long and distinct period of history
6
Territory controlled by another country
7
Armed entry into another territory
8
Exchange of goods between peoples