Across
1
Movement of people to new areas
4
Metal that replaced bronze in tools
5
Fundamental law of a nation
7
Territory controlled by another country
9
Fortified medieval residence
11
Formal agreement between nations
Down
1
Person who buys and sells goods
2
Union formed for mutual benefit
3
Alloy of copper and tin used in early tools
6
Armed entry into another territory
8
Person who travels to discover new lands
10
Person with no fixed home
12
Deadly epidemic disease
13
Ancient empire that conquered much of Europe