Across
1
Military blockade of a fortified place
4
Territory controlled by another country
5
Movement of people to new areas
6
Large territory under one ruler
9
Government elected by the people
10
Long and distinct period of history
11
Sudden overthrow of a government
12
Formal agreement between nations
Down
2
Metal that replaced bronze in tools
3
Practice of farming and growing food
4
Fortified medieval residence
7
Alloy of copper and tin used in early tools
8
Male monarch ruler