Across
1
Armored warrior of medieval times
3
Metal that replaced bronze in tools
4
Practice of establishing foreign colonies
6
Period of ten years
7
Long and distinct period of history
9
Person who buys and sells goods
11
Military blockade of a fortified place
Down
2
Freedom from outside control
5
Ancient Egyptian picture writing
8
Period of one hundred years
10
Ancient empire that conquered much of Europe
12
Union formed for mutual benefit