The Manchu Invasions refer to a series of military campaigns by the Manchu people from the region of modern-day northeastern China. These invasions began in the early 17th century and ultimately led to the fall of the Ming Dynasty. The Manchu established the Qing Dynasty, which ruled China for nearly three centuries. The invasions were characterized by strategic warfare and alliances with various local groups. The Manchu forces utilized their cavalry effectively, allowing them to conquer vast territories. By 1644, they had taken control of Beijing, marking the beginning of a new era in Chinese history under Qing rule.