横向
1
Fundamental law of a nation
4
Long and distinct period of history
7
Large territory under one ruler
10
Person owned as property
12
Formal agreement between nations
13
Medieval land-for-service system
15
Military conflict or fight
纵向
2
Union formed for mutual benefit
3
Ancient empire that conquered much of Europe
5
Medieval religious military campaign
6
Succession of rulers from same family
8
Handwritten historical document
9
Belonging to a very old period
11
Government ruled by a king or queen
14
Government elected by the people