Across
1
Military blockade of a fortified place
3
Armed conflict between nations
5
Advanced stage of human society
6
Belonging to a very old period
9
Movement of people to new areas
10
Person who travels to discover new lands
11
Exchange of goods between peoples
Down
2
Long and distinct period of history
4
Military conflict or fight
7
Metal that replaced bronze in tools
8
Uprising against authority
12
Person who buys and sells goods