Preemption
This doctrine is centered around the attempt to repel or defeat a perceived imminent offensive or invasion. The aim is to gain a strategic advantage in an impending (allegedly unavoidable) conflict shortly before it materializes into a crisis. Its principles include unilateralism and the use of preventative war.

A Tsar was a Russian leader in the early 1900s who was similar to a <u>king</u>
<u>_____________________________</u>
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Answer:
They were located mainly in Mexico and Central America.
"The Maya occupied a vast area covering southeast Mexico and the Central American countries of Guatemala, Belize, Honduras, and El Salvador."