Across
1
Union formed for mutual benefit
5
Armed conflict between nations
7
Ancient Mesoamerican civilization
8
Alloy of copper and tin used in early tools
9
Belonging to a very old period
10
Person with no fixed home
11
Person who travels to discover new lands
12
Fortified medieval residence
Down
2
Advanced stage of human society
3
Fundamental law of a nation
4
Large territory under one ruler
6
Movement of people to new areas
13
Medieval religious military campaign