横向
1
Payment made to show submission
4
Government by the people
5
Long and distinct period of history
6
Military blockade of a fortified place
7
Metal that replaced bronze in tools
8
Government ruled by a king or queen
9
Armed entry into another territory
纵向
2
Medieval religious military campaign
3
Advanced stage of human society
10
Ancient empire that conquered much of Europe
11
Large territory under one ruler
12
Person who buys and sells goods
13
Government elected by the people