Across
1
Advanced stage of human society
5
Period of ten years
6
Formal agreement between nations
8
Metal that replaced bronze in tools
10
Ancient Egyptian picture writing
11
Armed conflict between nations
12
Handwritten historical document
13
Practice of farming and growing food
Down
2
Armed entry into another territory
3
Person owned as property
4
Period of one hundred years
7
Medieval religious military campaign
9
Object made by humans from the past