On 20 July, the day after the battle if the Annales Complutenses can be trusted, Alfonso's alférez, Martín Alfónsez, confirmed a private donation to Sahagún.
It was on 20 July, the day after the conflict, according to the Annales Complutenses, that Alfonso's chief attendant, Martín Alfónsez, verified a personal contribution to Sahagún.