Across
1
Advanced stage of human society
5
Alloy of copper and tin used in early tools
8
Ancient empire that conquered much of Europe
9
Exchange of goods between peoples
12
Roman arena fighter
13
Long and distinct period of history
Down
2
Formal agreement between nations
3
Ancient Egyptian ruler
4
Metal that replaced bronze in tools
6
Period of ten years
7
Medieval land-for-service system
10
Movement of people to new areas
11
Payment made to show submission