Ла-Буреба
Because of the desertions of some "ricoshombres", including Alfonso de Valencia, Rodrigo Álvarez de las Asturias and García Fernández de Villamayor, and also because of the illness of the Dowager Queen, who couldn't advise him, Ferdinand IV decided to negotiate with Juan Núñez II de Lara the surrender of the latter. After the capitulation of the town of Tordehumos at the beginning of 1308, Juan Núñez II de Lara promised to surrender all his lands to the King, except those he had in La Bureba and La Rioja, for having them Diego López V de Haro, while paid homage to Ferdinand IV, who signed this agreement without the knowledge of his mother, seriously ill in those moments.