横向
1
Long and distinct period of history
4
Period of one hundred years
5
Relating to the Middle Ages
6
Military conflict or fight
9
Belonging to a very old period
10
Freedom from outside control
11
Military blockade of a fortified place
12
Metal that replaced bronze in tools
纵向
2
Sudden overthrow of a government
3
Medieval land-for-service system
7
Advanced stage of human society
8
Object made by humans from the past