横向
1
Legislative assembly of a country
6
Government elected by the people
7
Freedom from outside control
8
Person owned as property
9
Armed entry into another territory
11
Armed conflict between nations
纵向
2
Sudden overthrow of a government
3
Person who travels to discover new lands
4
Metal that replaced bronze in tools
5
Union formed for mutual benefit
10
Advanced stage of human society
12
Fundamental law of a nation
13
Fortified medieval residence
14
Large territory under one ruler
15
Formal agreement between nations