横向
1
Belonging to a very old period
5
Ancient empire that conquered much of Europe
7
Period of one hundred years
8
Medieval land-for-service system
9
Union formed for mutual benefit
12
Formal agreement between nations
纵向
2
Person who buys and sells goods
3
Period of ten years
4
Large territory under one ruler
6
Sudden overthrow of a government
10
Succession of rulers from same family
11
Military blockade of a fortified place