横向
1
Metal that replaced bronze in tools
4
Movement of people to new areas
5
Territory controlled by another country
8
Long and distinct period of history
9
Belonging to a very old period
11
Armed conflict between nations
纵向
2
Fundamental law of a nation
3
Alloy of copper and tin used in early tools
6
Medieval religious military campaign
7
Ancient empire that conquered much of Europe
10
Succession of rulers from same family
12
Period of one hundred years
13
Fortified medieval residence