Across
1
Object made by humans from the past
6
Metal that replaced bronze in tools
7
Person with no fixed home
8
Advanced stage of human society
12
Government by the people
13
Payment made to show submission
14
Armored warrior of medieval times
Down
2
Movement of people to new areas
3
Fundamental law of a nation
4
Formal agreement between nations
5
Belonging to a very old period
9
Ancient empire that conquered much of Europe
10
Deadly epidemic disease
11
Military conflict or fight
15
Ancient Mesoamerican civilization