横向
1
Formal agreement between nations
3
Person who travels to discover new lands
7
Person who buys and sells goods
8
Succession of rulers from same family
9
Military conflict or fight
10
Fortified medieval residence
11
Person owned as property
12
Handwritten historical document
纵向
2
Government ruled by a king or queen
4
Government elected by the people
5
Legislative assembly of a country
6
Union formed for mutual benefit
13
Alloy of copper and tin used in early tools