After recapturing the Emirate of Granada from his uncle, the Sultan Muhammed X in 1447, Muhammed IX continued his bellicose policies with regards to the Kingdom of Castile. His predecessor (Muhammad X) had managed to retake a few frontier towns from the Kingdom of Murcia through regular raids or Razzis which terrorized the region's Christian population. Most of these incursions into Christian territory took advantage of squabbles within the Kingdom of Murcia's ruling family, the House of Fajardo. In 1448, Muslim forces captured and sacked the town of Cieza, and soon defeated Christian forces at the
Battle of Hellín.
The continued Muslim incursions into Murcia obliged the Castilian monarch, John II of Castile to ask for a truce in 1450 in order to concentrate his own forces in a separate war against Juan Pacheco, the Marquis of Villena. However, Muhammad IX refused the truce, preferring to take full advantage of the disunity amongst Castilian nobles. The Granadan Sultan's fresh incursion into Murcia brought back much plunder in 1451. Muhammad IX then planned a large scale Algara (Arabic for incursion: الغارة) against the area of Campo de Cartagena. This raid captured 40,000 heads of cattle and around 40 prisoners, mostly herdsmen.
The immensity of this raid incursion forced Castile's Christians to put aside their internal squabbles and form a united front against the Kingdom of Granada. The Alcalde of Lorca Castle,
Alonso Fajardo, nicknamed el Bravo (English: The Brave) sent heralds to various towns within the Kingdom of Murcia. The resulting army from Aledo, Caravaca de la Cruz, and Murcia totaled around 300 knights and 2,000 infantry soldiers. They encamped outside Lorca, in a field called Los Alporchones, knowing that the Muslim raiders would have to pass through the area when returning from their pillaging expedition.