The first invasion of Korea by the Manchu people, which occurred in 1627 during the Dingmao year

The Manchu invasion of Korea in 1636, resulting in the Joseon dynasty becoming a tributary state of the Qing dynasty.

(idiom) the invasion and mass migration of non-Han nomadic tribes into northern China during the 4th century CE, leading to the collapse of the Western Jin dynasty; also known as the Five Hu rebellion.