The Mysorean invasion of Malabar (1766 –1792) was the military invasion of the Malabar region of Kerala, including the territories of the Zamorin of Calicut, by the then-de facto ruler of the Kingdom of Mysore, Hyder Ali. After the invasion, the Kingdom of Cochin to the south of Malabar became a tributary state of Mysore. By the late 18th century, the small kingdoms had been absorbed or subordinated by three large states: Travancore, Calicut (ruled by Zamorins), and the Kingdom of Cochin.