Across
1
Metal that replaced bronze in tools
3
Large territory under one ruler
6
Advanced stage of human society
8
Practice of establishing foreign colonies
9
Long and distinct period of history
10
Legislative assembly of a country
11
Belonging to a very old period
Down
2
Person who buys and sells goods
4
Person with no fixed home
5
Exchange of goods between peoples
6
Fortified medieval residence
7
Medieval land-for-service system