Why did Mayan city-states go to war with one another?

What triggered the surge of conservative governments in central europe at the end of world war i? a. the disintegration of european families in the wake of urbanization. b. a worldwide revolutionary upsurge. c. the revival of the austrian-hungarian and ottoman empires. d. the british suppression of the indian nationalist movement. e. the killing of the tsar during the russian revolution?

What enabled the drastic increase in us troop development to vietnam between 1964 and 1965?

According to the map, most mining occurs in the a. northern b. southern c. eastern d. western