横向
1
Practice of establishing foreign colonies
4
Medieval land-for-service system
6
Formal agreement between nations
8
Exchange of goods between peoples
9
Long and distinct period of history
10
Period of one hundred years
13
Practice of farming and growing food
纵向
2
Armed conflict between nations
3
Person owned as property
5
Person who buys and sells goods
7
Government by the people
11
Union formed for mutual benefit
12
Military blockade of a fortified place