横向
1
Person who travels to discover new lands
6
Union formed for mutual benefit
7
Roman arena fighter
8
Payment made to show submission
10
Armored warrior of medieval times
12
Practice of establishing foreign colonies
13
Succession of rulers from same family
纵向
2
Medieval land-for-service system
3
Belonging to a very old period
4
Ancient Egyptian ruler
5
Ancient empire that conquered much of Europe
9
Sudden overthrow of a government
11
Long and distinct period of history