横向
1
Long and distinct period of history
2
Formal agreement between nations
4
Medieval land-for-service system
5
Large territory under one ruler
6
Legislative assembly of a country
纵向
2
Exchange of goods between peoples
3
Military conflict or fight
7
Period of one hundred years
8
Advanced stage of human society
9
Government elected by the people
10
Armored warrior of medieval times
11
Ancient Mesoamerican civilization
12
Person with no fixed home