Across
1
Government ruled by a king or queen
4
Armed entry into another territory
7
Metal that replaced bronze in tools
8
Long and distinct period of history
9
Legislative assembly of a country
11
Armored warrior of medieval times
12
Period of ten years
Down
2
Sudden overthrow of a government
3
Person owned as property
5
Union formed for mutual benefit
6
Period of one hundred years
9
Deadly epidemic disease
10
Ancient Mesoamerican civilization