The records of the Succession War with the Thrane described the emergence of the clandestine alliance between two maritime domains of Merenae: Aberri and La Corna. While it were the Cornejos who had stockyards, workshops, technology and wherewithal to produce ocean-going vessels armed with modern weaponry first developed by Espada Cornejo, those were mostly put to good use by Abertzales. The infamous Sacking of Morriston that gave the kingdom a favourable exit from a war that seemed unwinnable was the highlight of this cooperation.

The journal describes how entente continued into the next century in the maritime domain, with Lekeitio serving as the entrepot for goods pillaged from Sheel ships on the Spice Route, then rerouted to legitimate markets via La Corteza. The origins of wealth of the Cornejo lay there, build on piracy spearheaded and masterminded by Aljundro Cornejo, who had an Abertzale mother. His son Teodoro spent a part of his childhood in the north and when he came of age there he formed one of his first crews who in 430s was subverting Sheel rule over Anisrana and ports of J'li'lu.