Across
1
Medieval land-for-service system
3
Metal that replaced bronze in tools
5
Ancient empire that conquered much of Europe
7
Person with no fixed home
8
Object made by humans from the past
9
Exchange of goods between peoples
10
Armed entry into another territory
11
Long and distinct period of history
Down
2
Alloy of copper and tin used in early tools
4
Freedom from outside control
6
Sudden overthrow of a government
12
Government by the people
13
Military conflict or fight