Aïn M'lila (Arabic: عين مليلة, Ayn Malīlah; which means "the white source", the root m-l-l being of Berber origin) is a town and commune in Oum El Bouaghi Province, Algeria.

They were the oldest and most formidable cavalry which was established in Aïn M'lila on the road between Constantine and Batna during the Ottoman Empire ruling.

On an order of the Bey, they would take up arms, to ride and lend a hand, or to punish the rebels, or to facilitate the implementation of administrative measures.

Under the last Bey, Hadj Ahmed, they had more than five hundred horsemen commanded by ten or fifteen chaouche, as circumstances require.

It was built by the Army Corps of Engineers on a flat, dry lakebed at an altitude of 2580 feet, designed for heavy bomber use by the United States Army Air Force Twelfth Air Force during the North African Campaign with concrete runways, hardstands and taxiways.