Across
1
Deadly epidemic disease
5
Long and distinct period of history
6
Advanced stage of human society
8
Period of ten years
Down
2
Union formed for mutual benefit
3
Military blockade of a fortified place
4
Formal agreement between nations
7
Metal that replaced bronze in tools
9
Ancient Egyptian picture writing
10
Large territory under one ruler
11
Alloy of copper and tin used in early tools
12
Military conflict or fight