横向
1
Formal agreement between nations
4
Practice of farming and growing food
5
Payment made to show submission
11
Armed conflict between nations
纵向
2
Metal that replaced bronze in tools
3
Person who buys and sells goods
6
Exchange of goods between peoples
7
Succession of rulers from same family
8
Long and distinct period of history
9
Handwritten historical document
10
Roman arena fighter
12
Fundamental law of a nation