García I was the King of León from 910 until his death and eldest of three succeeding sons of Alfonso III the Great by his wife Jimena.

García took part in the government alongside his father until 909. In that year a conspiracy, in which García was implicated, was uncovered . Alfonso renounced the throne and divided the realm between his three sons. León went to García, Galicia to Ordoño

Ordoño II of León

Ordoño II was king of Galicia from 910, and king of Galicia and León from 914 until his death. He was the second son of King Alfonso III the Great and his wife, Jimena of Pamplona....

, and Asturias

Asturias

The Principality of Asturias is an autonomous community of the Kingdom of Spain, coextensive with the former Kingdom of Asturias in the Middle Ages...

 to Fruela

Fruela II of León

Fruela II was the King of Asturias from the death of his father, Alfonso III of Asturias, in 910 to his own death. When his father died, the kingdom was divided, with the third son, Fruela, taking the original portion ; the second, Ordoño, taking Galicia; and the eldest, García, taking León...

. Asturian primacy was nevertheless recognised.

García's reign saw the fortification of the Duero and the repopulation

Repoblación

The Repoblación was the ninth-century repopulating of a large region between the River Duero and the Cantabrian Cordillera which had been depopulated in the early years of the Reconquista....

 of Roa

Roa, Burgos

Roa is a Spanish town and municipality in the south of the province of Burgos. It has a population of roughly 3,000 people. The closest airport is in Valladolid....

, Osma, Clunia

Clunia

Clunia was an ancient Roman city. Its remains are located on Alto de Castro, at more than 1000 metres above sea level, between the villages of Peñalba de Castro and Coruña del Conde, 2 km away from the latter, in the province of Burgos in Spain...

, and San Esteban de Gormaz

San Esteban de Gormaz

San Esteban de Gormaz is a municipality in the province of Soria in the autonomous community of Castile-Leon, Spain. Its population is approximately 3,500...

. During this period, the count of Castile, Gonzalo Fernández

Gonzalo Fernández of Castile

Gonzalo Fernández was Count of Burgos and of Castile .Recorded for the first time in 899 as Count of Burgos, soon the region expanded to the eastern mountain valleys enabling Gonzalo to make his fort base in Lara, thus stretching his rule from the foot of the Cantabrian Mountains around Espinosa...

 gained influence through these endeavours. At his death in Zamora he had no heirs and his kingdom passed to Ordoño.

García's wife, Muniadomna, was said by Pelagius of Oviedo

Pelagius of Oviedo

Pelagius of Oviedo was a medieval ecclesiastic, historian, and forger who served the Diocese of Oviedo as an auxiliary bishop from 1098 and as bishop from 1102 until his deposition in 1130 and again from 1142 to 1143. He was an active and independent-minded prelate, who zealously defended the...

 to have been daughter of Nuño Fernández, but this is chronologically impossible, and Sánchez Albornoz

Claudio Sánchez-Albornoz y Menduiña

Claudio Sánchez-Albornoz y Menduiña was an eminent Spanish medieval historian, statesman, and a leader of the Spanish Republican government in Exile during the rule of Francisco Franco.- Education and Early Career :...

 suggested instead that she was daughter of Munio Núñez, the repoblador of Roa and Count of Castile. She may have been the Muniadomna later married to count Ferdinand Ansúrez of Castile.