The 1543–1544 Pachecos entrada was the final military campaign in the Spanish conquest of Yucatan, which brought three Postclassic Mayan states and several Amerindian settlements in the southeastern quarter of the Yucatan peninsula under the jurisdiction of Salamanca de Bacalar, a villa of colonial Yucatan, in New Spain. It is commonly deemed one of (if not the) bloodiest and cruelest entradas in the peninsula's conquest, resulting in the deaths of hundreds or thousands, and the displacement of tens of thousands, of Mayan residents.