Across
1
Ancient empire that conquered much of Europe
4
Fundamental law of a nation
5
Military blockade of a fortified place
6
Formal agreement between nations
8
Exchange of goods between peoples
11
Armed conflict between nations
12
Movement of people to new areas
Down
2
Government by the people
3
Union formed for mutual benefit
7
Government ruled by a king or queen
9
Freedom from outside control
10
Large territory under one ruler
13
Government elected by the people
14
Relating to the Middle Ages
15
Metal that replaced bronze in tools