Across
1
Person who travels to discover new lands
5
Person owned as property
6
Payment made to show submission
7
Practice of establishing foreign colonies
8
Roman arena fighter
9
Armored warrior of medieval times
12
Armed entry into another territory
Down
2
Exchange of goods between peoples
3
Sudden overthrow of a government
4
Union formed for mutual benefit
6
Formal agreement between nations
10
Advanced stage of human society
11
Deadly epidemic disease
13
Alloy of copper and tin used in early tools
14
Long and distinct period of history