Across
1
Advanced stage of human society
7
Ancient empire that conquered much of Europe
9
Deadly epidemic disease
10
Territory controlled by another country
11
Fortified medieval residence
12
Person owned as property
13
Formal agreement between nations
Down
2
Person with no fixed home
3
Large territory under one ruler
4
Military blockade of a fortified place
5
Practice of farming and growing food
6
Armed entry into another territory
8
Union formed for mutual benefit