Across
1
Armored warrior of medieval times
3
Person owned as property
4
Object made by humans from the past
6
Person who travels to discover new lands
9
Armed conflict between nations
10
Metal that replaced bronze in tools
11
Practice of establishing foreign colonies
12
Military conflict or fight
Down
2
Territory controlled by another country
5
Freedom from outside control
6
Long and distinct period of history
7
Period of ten years
8
Ancient empire that conquered much of Europe