横向
1
Medieval land-for-service system
4
Armed conflict between nations
5
Long and distinct period of history
7
Roman arena fighter
8
Fundamental law of a nation
纵向
2
Period of ten years
3
Legislative body in ancient Rome
6
Ancient Mesoamerican civilization
9
Military conflict or fight
10
Alloy of copper and tin used in early tools
11
Handwritten historical document
12
Territory controlled by another country
13
Formal agreement between nations