The Catalan Revolt, also known as the Reapers' War, began in 1640 in Catalonia, a northeastern region of Spain. It was fueled by widespread dissatisfaction with heavy taxation and military conscription imposed by the Spanish Crown to support overseas wars. The revolt significantly challenged Spanish authority, sparked desires for Catalan independence, and weakened Spain's grip over its territories. These events marked a decline in Spanish dominance, influencing the European power balance in favor of other rising states.