横向
1
Practice of establishing foreign colonies
6
Medieval land-for-service system
7
Government elected by the people
10
Succession of rulers from same family
纵向
2
Metal that replaced bronze in tools
3
Armored warrior of medieval times
4
Ancient Mesoamerican civilization
5
Military blockade of a fortified place
8
Union formed for mutual benefit
9
Relating to the Middle Ages