Across
1
Ancient Egyptian ruler
4
Fortified medieval residence
5
Sudden overthrow of a government
6
Advanced stage of human society
8
Medieval land-for-service system
12
Roman arena fighter
Down
2
Government ruled by a king or queen
3
Formal agreement between nations
7
Person who travels to discover new lands
9
Union formed for mutual benefit
10
Deadly epidemic disease
11
Practice of establishing foreign colonies
13
Large territory under one ruler