横向
1
Union formed for mutual benefit
7
Medieval land-for-service system
8
Object made by humans from the past
11
Period of one hundred years
12
Alloy of copper and tin used in early tools
13
Ancient empire that conquered much of Europe
纵向
2
Military conflict or fight
3
Government elected by the people
4
Succession of rulers from same family
5
Fortified medieval residence
6
Legislative body in ancient Rome
9
Ancient Mesoamerican civilization
10
Legislative assembly of a country
14
Armored warrior of medieval times
15
Deadly epidemic disease