Across
1
Fortified medieval residence
4
Ancient Mesoamerican civilization
5
Metal that replaced bronze in tools
7
Armored warrior of medieval times
8
Exchange of goods between peoples
9
Long and distinct period of history
10
Union formed for mutual benefit
11
Large territory under one ruler
Down
2
Sudden overthrow of a government
3
Advanced stage of human society
4
Relating to the Middle Ages
6
Alloy of copper and tin used in early tools
12
Medieval religious military campaign
13
Ancient empire that conquered much of Europe