The Treaty of Cazola was signed in 1179 in Soria

Soria

Soria is a city in north-central Spain, the capital of the province of Soria in the autonomous community of Castile and León. , the municipality has a population of c. 39,500 inhabitants, nearly 40% of the population of the province...

 between Alfonso II of Aragon

Alfonso II of Aragon

Alfonso II or Alfons I ; Huesca, 1-25 March 1157 – 25 April 1196), called the Chaste or the Troubadour, was the King of Aragon and Count of Barcelona from 1164 until his death. He was the son of Ramon Berenguer IV of Barcelona and Petronilla of Aragon and the first King of Aragon who was...

 and Alfonso VIII of Castile

Alfonso VIII of Castile

Alfonso VIII , called the Noble or el de las Navas, was the King of Castile from 1158 to his death and King of Toledo. He is most remembered for his part in the Reconquista and the downfall of the Almohad Caliphate...

. The pact divided Andalusia

Andalusia

Andalusia is the most populous and the second largest in area of the autonomous communities of Spain. The Andalusian autonomous community is officially recognised as a nationality of Spain. The territory is divided into eight provinces: Huelva, Seville, Cádiz, Córdoba, Málaga, Jaén, Granada and...

 into separate zones of conquest for the two kingdoms, so that the work of the Reconquista

Reconquista

The Reconquista was a period of almost 800 years in the Middle Ages during which several Christian kingdoms succeeded in retaking the Muslim-controlled areas of the Iberian Peninsula broadly known as Al-Andalus...

would not be stymied by internecine feuding over spoils among the Christians. Aragon was given the places of Xàtiva

Xàtiva

Xàtiva is a town in eastern Spain, in the province of Valencia, on the right bank of the river Albaida and at the junction of the Valencia–Murcia and Valencia Albacete railways....

, Denia

Dénia

Dénia is a city in the province of Alicante, Spain, on the Costa Blanca halfway between Alicante and Valencia, the judicial seat of the comarca of Marina Alta...

, and Biar

Biar

Biar is a town in the comarca of Alt Vinalopó, province of Alicante, Spain. Biar lies at the foot of the Serra de Mariola and is located 39km from the city of Alicante.The economy in Biar is based on manufacture, particularly dolls, and pottery....

, from Biar to Calpe

Calpe

Calp is a coastal town located in the comarca of Marina Alta, in the province of Alicante, Spain, by the Mediterranean Sea. It has an area of 23.5 km² and a population density of 855.45 persons/km². The town is located 67 km from the city of Alicante, lying at the foot of the Natural...

 towards Valencia. Castile had all the lands on the other side of Biar. Compared with the earlier Treaty of Tudilén

Treaty of Tudilén

The Treaty of Tudilén was signed between Alfonso VII of León and Castile and Ramon Berenguer IV, Count of Barcelona in 1151 at Tudilén, near Aguas Caldas in Navarre, modern Baños de Fitero, then just Fitero...

, Aragon had lost the right of annexing Murcia

Murcia

-History:It is widely believed that Murcia's name is derived from the Latin words of Myrtea or Murtea, meaning land of Myrtle , although it may also be a derivation of the word Murtia, which would mean Murtius Village...

. The agreement further stipulated that it was to be held in perpetuity and upheld by the successors of both Alfonsos. This was reinforced with a clause stating that neither king could give up his part or diminish the part of the other, nor could any obstacle be put in the way by either king of the conquest by his counterpart of his rightful division. The subsequent breach of the treaty by both parties led to the Treaty of Almizra

Treaty of Almizra

The Treaty of Almizra was the third of a series of three treaties between the Crowns of Aragon and Castile meant to determine the limits of their expansion into Andalusia so as to prevent squabbling between the Christian princes. Specifically, it defined the borders of the Kingdom of Valencia...

in 1244.