Across
1
Metal that replaced bronze in tools
4
Movement of people to new areas
5
Government by the people
6
Legislative body in ancient Rome
10
Military blockade of a fortified place
12
Person with no fixed home
Down
2
Exchange of goods between peoples
3
Practice of establishing foreign colonies
7
Fortified medieval residence
8
Legislative assembly of a country
9
Armed conflict between nations
11
Deadly epidemic disease
13
Large territory under one ruler
14
Long and distinct period of history
15
Collection of traditional stories