Across
1
Formal agreement between nations
3
Person owned as property
6
Large territory under one ruler
7
Person with no fixed home
8
Medieval land-for-service system
9
Person who travels to discover new lands
10
Fundamental law of a nation
11
Union formed for mutual benefit
13
Roman arena fighter
Down
2
Deadly epidemic disease
4
Sudden overthrow of a government
5
Period of ten years
12
Legislative assembly of a country