横向
1
Movement of people to new areas
5
Formal agreement between nations
6
Ancient empire that conquered much of Europe
7
Medieval land-for-service system
9
Ancient Mesoamerican civilization
10
Territory controlled by another country
11
Long and distinct period of history
12
Practice of establishing foreign colonies
纵向
2
Fortified medieval residence
3
Legislative assembly of a country
4
Government ruled by a king or queen
8
Object made by humans from the past
9
Relating to the Middle Ages
13
Succession of rulers from same family