横向
1
Exchange of goods between peoples
5
Government ruled by a king or queen
6
Belonging to a very old period
8
Military conflict or fight
纵向
2
Period of ten years
3
Deadly epidemic disease
4
Period of one hundred years
7
Armed conflict between nations
9
Person with no fixed home
10
Male monarch ruler
11
Ancient Mesoamerican civilization
12
Armored warrior of medieval times