Sancho Garcés III, also known as Sancho the Great, was the King of Pamplona from 1004 until his death in 1035. He also ruled the County of Aragon and by marriage the counties of Castile, Álava and Monzón. He later added the counties of Sobrarbe (1015), Ribagorza (1018) and Cea (1030), and would intervene in the Kingdom of León, taking its eponymous capital city in 1034.

The Kingdom of Navarre, originally the Kingdom of Pamplona, was a Basque kingdom that occupied lands on both sides of the western Pyrenees, with its northernmost areas originally reaching the Atlantic Ocean, between present-day Spain and France.