横向
1
Exchange of goods between peoples
5
Armed entry into another territory
6
Territory controlled by another country
7
Roman arena fighter
8
Person owned as property
9
Payment made to show submission
纵向
2
Sudden overthrow of a government
3
Large territory under one ruler
4
Object made by humans from the past
10
Medieval land-for-service system
11
Succession of rulers from same family
12
Male monarch ruler
13
Belonging to a very old period