This fast-paced educational video explores the complex landscape of 18th-century warfare, moving beyond European borders to examine how conflicts became truly global events. Host John Green explains how the century began with dynastic struggles like the War of Austrian Succession before evolving into the first true "world wars," such as the Seven Years' War, which was fought across continents from North America to India. The narrative connects these military endeavors to their domestic consequences, specifically illustrating how the massive financial burden of constant warfare led monarchs to increase taxation, directly fueling social unrest and revolutionary movements.