Across
1
Person who buys and sells goods
6
Alloy of copper and tin used in early tools
7
Sudden overthrow of a government
8
Metal that replaced bronze in tools
9
Movement of people to new areas
11
Union formed for mutual benefit
12
Succession of rulers from same family
Down
2
Large territory under one ruler
3
Payment made to show submission
4
Armed entry into another territory
5
Legislative assembly of a country
10
Fundamental law of a nation
13
Formal agreement between nations