Across
1
Belonging to a very old period
6
Large territory under one ruler
7
Formal agreement between nations
8
Fortified medieval residence
9
Metal that replaced bronze in tools
10
Ancient Mesoamerican civilization
11
Payment made to show submission
12
Succession of rulers from same family
Down
2
Sudden overthrow of a government
3
Period of one hundred years
4
Collection of traditional stories
5
Deadly epidemic disease
6
Long and distinct period of history