In spite of being repulsed from Ensenada and suffering the mutiny of his US troops, Walker declared himself president of the Republic of Sonora, which also included Baja California, and, like his successor, was not there in fact or endorsement.

Later, the expedition captured Colonel Juan Clímaco Rebolledo, who came to replace Espinosa in the office of a political leader without knowing that the capital of Baja California had been seized by the American invaders.

Since the expedition of reinforcements from California were slow in coming, Walker decided to move its headquarters to the north of the peninsula, near the border with U.S. and the land passage to Sonora, which was the goal of their ambitions and also the US government, which had already expressed its intention to buy northwestern Mexico.

In La Paz, there were some clashes between civilian residents and filibusters, Walker played as military victories over the Mexican government, which he accused of being tyrant and decadent.

And in Ensenada, the filibusters established their headquarters in what is now the Third and Gastélum streets of that city [2] From there, Walker issued a proclamation to the American people, requesting their support to defend the independence of Baja California, which had a self-appointed president.