横向
1
Medieval land-for-service system
4
Large territory under one ruler
5
Uprising against authority
9
Sudden overthrow of a government
10
Alloy of copper and tin used in early tools
11
Metal that replaced bronze in tools
纵向
2
Long and distinct period of history
3
Legislative body in ancient Rome
6
Territory controlled by another country
7
Object made by humans from the past
8
Person who travels to discover new lands