See below for Map of Spanish regions

The Flag of Spain (Aragonese-Catalan)

The heiress of Aragón married the Count of Barcelona, and the gold shield of the latter was adopted by the kingdom. After a battle, however, Ramón Berenguer, Count of Barcelona, wiped his bloody fingers down the shield and thereafter it became "Or with four pales gules" (gold with four red stripes). n.b. Ramon = Berenguer IV (1101-1130) married Doña Petronila

The Reconquista ( the Spanish Reconquest):

The early Reconquista was not, in actuality, a religious war. Regional Warlords, both Christian and Moslem, Franks and Spaniards: Basques, Castilians, Navarrese, etc., etc., all warring amongst and between themselves and repeatedly changing sides, for one central purpose: to expand their personal holdings. It was convoluted and constantly in flux. When it came to land, religion didn't count all that much. Pamplona with it's native Navarrese (Basques) is a typical example: