横向
1
Person with no fixed home
4
Period of one hundred years
5
Union formed for mutual benefit
8
Person who travels to discover new lands
10
Movement of people to new areas
12
Ancient Mesoamerican civilization
纵向
2
Alloy of copper and tin used in early tools
3
Large territory under one ruler
4
Advanced stage of human society
6
Armored warrior of medieval times
7
Exchange of goods between peoples
9
Roman arena fighter
11
Armed conflict between nations
13
Medieval religious military campaign
14
Medieval land-for-service system