Across
1
Ancient empire that conquered much of Europe
2
Fundamental law of a nation
4
Medieval land-for-service system
5
Military conflict or fight
6
Formal agreement between nations
9
Government ruled by a king or queen
Down
2
Advanced stage of human society
3
Period of ten years
7
Military blockade of a fortified place
8
Freedom from outside control
10
Person who buys and sells goods