Then the high Carlist political instances adopt, upon failing an important loan, the decision to seize Bilbao in order to carry out an action of great international resonance. Despite not sharing the decision (he wanted to conquer Madrid), on June 10, 1835, without wasting time, Zumalac Rregui seized Lutxana, Banderas, Abando and Deusto, as well as the Miravilla and Morro heights. . He ordered the town on the 12th and began the siege the next day.