Across
1
Sudden overthrow of a government
7
Medieval land-for-service system
8
Military conflict or fight
10
Ancient empire that conquered much of Europe
12
Metal that replaced bronze in tools
Down
2
Alloy of copper and tin used in early tools
3
Relating to the Middle Ages
4
Territory controlled by another country
5
Government ruled by a king or queen
6
Formal agreement between nations
9
Armed entry into another territory
11
Advanced stage of human society