Across
1
Alloy of copper and tin used in early tools
5
Medieval religious military campaign
6
Medieval land-for-service system
7
Armed entry into another territory
8
Person who buys and sells goods
11
Fortified medieval residence
Down
2
Uprising against authority
3
Sudden overthrow of a government
4
Union formed for mutual benefit
9
Succession of rulers from same family
10
Deadly epidemic disease
12
Advanced stage of human society