横向
1
Fundamental law of a nation
4
Metal that replaced bronze in tools
6
Armed conflict between nations
7
Medieval religious military campaign
8
Ancient empire that conquered much of Europe
10
Medieval land-for-service system
纵向
2
Person who travels to discover new lands
3
Succession of rulers from same family
4
Freedom from outside control
5
Formal agreement between nations
9
Person who buys and sells goods