Across
1
Armed conflict between nations
3
Ancient empire that conquered much of Europe
4
Exchange of goods between peoples
8
Movement of people to new areas
9
Large territory under one ruler
10
Government elected by the people
11
Armed entry into another territory
Down
2
Fortified medieval residence
5
Ancient Mesoamerican civilization
6
Alloy of copper and tin used in early tools
7
Sudden overthrow of a government