Across
1
Government ruled by a king or queen
4
Exchange of goods between peoples
6
Movement of people to new areas
7
Roman arena fighter
8
Ancient empire that conquered much of Europe
9
Formal agreement between nations
10
Belonging to a very old period
Down
2
Advanced stage of human society
3
Payment made to show submission
5
Armored warrior of medieval times
11
Government by the people
12
Medieval land-for-service system