横向
1
Formal agreement between nations
5
Armed entry into another territory
6
Roman arena fighter
9
Ancient empire that conquered much of Europe
纵向
2
Period of ten years
3
Succession of rulers from same family
4
Object made by humans from the past
7
Person who travels to discover new lands
8
Ancient Mesoamerican civilization
10
Male monarch ruler
11
Metal that replaced bronze in tools