Across
1
Metal that replaced bronze in tools
3
Large territory under one ruler
6
Exchange of goods between peoples
7
Period of ten years
8
Legislative body in ancient Rome
10
Long and distinct period of history
12
Medieval religious military campaign
Down
2
Belonging to a very old period
4
Sudden overthrow of a government
5
Ancient Egyptian stone monument
9
Payment made to show submission
11
Formal agreement between nations
13
Government by the people