横向
1
Movement of people to new areas
6
Person who travels to discover new lands
7
Person with no fixed home
8
Government elected by the people
9
Handwritten historical document
10
Fundamental law of a nation
纵向
2
Ancient empire that conquered much of Europe
3
Metal that replaced bronze in tools
4
Military blockade of a fortified place
5
Freedom from outside control
10
Advanced stage of human society