Across
1
Formal agreement between nations
5
Sudden overthrow of a government
6
Alloy of copper and tin used in early tools
8
Ancient Mesoamerican civilization
9
Exchange of goods between peoples
10
Period of one hundred years
Down
2
Union formed for mutual benefit
3
Advanced stage of human society
4
Legislative body in ancient Rome
7
Payment made to show submission
8
Handwritten historical document