横向
1
Metal that replaced bronze in tools
3
Military blockade of a fortified place
4
Long and distinct period of history
5
Practice of establishing foreign colonies
6
Succession of rulers from same family
8
Sudden overthrow of a government
9
Object made by humans from the past
10
Large territory under one ruler
12
Armed conflict between nations
纵向
2
Movement of people to new areas
3
Legislative body in ancient Rome
7
Armed entry into another territory
11
Period of ten years