The Third Anglo-Maratha War (1817–1819) was the final and decisive conflict between the British East India Company and the Maratha Empire in India. The war left the Company in control of most of India. It began with an invasion of Maratha territory by British East India Company troops, and although the British were outnumbered, the Maratha army was decimated. The troops were led by Governor General Hastings, supported by a force under General Thomas Hislop. Operations began against the Pindaris, a band of Muslim mercenaries and Marathas from central India.

The Maratha Empire, also referred to as the Maratha Confederacy, was an early modern Indian empire and later a confederation that controlled large portions of the Indian Subcontinent in the 18th century. Maratha rule formally began in 1674 with the coronation of Shivaji of the Bhonsle dynasty as the Chhatrapati. Although Shivaji came from the Maratha caste, the Maratha empire also included warriors, administrators, and other nobles from the Maratha and several other castes from what is known today as Maharashtra. The Maratha Kingdom was expanded into a full-fledged Empire in the 18th Century under the leadership of Peshwa Bajirao I.