横向
1
Period of one hundred years
3
Government ruled by a king or queen
4
Military conflict or fight
6
Payment made to show submission
7
Handwritten historical document
9
Ancient Mesoamerican civilization
11
Medieval land-for-service system
纵向
2
Large territory under one ruler
3
Person who buys and sells goods
5
Alloy of copper and tin used in early tools
8
Movement of people to new areas
10
Armed conflict between nations