[1] At the end of the year, General Corona ordered him to start operating in the north of Sinaloa and the south of the state, he liberated El Fuerte from the imperialist forces and began an offensive into Sonora.

He distinguished himself as a brave, active and inhuman leader who went to the state of Sonora to inject energy into the Republican cause at a time when other Republican leaders were beginning to lose morale and brought a system of ruthless and violent war that was unknown before and didn't show any mercy to his enemies, executing them on the spot or making them victims of strong exactions expressing that if they had caught him they would not forgive him, and therefore he should not give them quarter.

[1] He returned to Sinaloa most of his brigade under the command of Corona, informing the National Guard that hos forces were organized and in April, he advanced on the interior of the State.

On this date he was promoted to General de brigada and made conjunction with Governor Ignacio Pesqueira, capturing Hermosillo on May 4 in the morning but in the afternoon of the same day, he was defeated by the imperialists.

[1] Appointed chief of the I Division of the Western Army Corps, he dispatched Colonel Dávalos by sea with elements that served as his base and in November, he went to join General Corona's forces.

Regarding his performance in the State, Governor Pesqueira expressed the following in a circular dated October 1, 1866 : Sonora has had as auxiliaries the Governor of Sinaloa and Division General Ramón Corona, who, upon sending me some reinforcements of troops, also sent me General Ángel Martínez and other worthy chiefs, who, longing to fight in defense of the national cause, do not know make distinction of place; but they do know how to distinguish themselves by their bravery, their serenity in danger and by the activity of the long-suffering and persevering soldier.

Sonora recognizes herself indebted for this very distinguished service, which she will hasten to reward in the same way, paying them a sincere tribute of gratitude.Upon his arrival in Mazatlan, he was appointed Chief of the Arms of Sinaloa and held that post until 1868.

Seeing that his cause was lost, he seized thirty thousand pesos from the Mazatlan maritime customs office, left half in the hands of a trusted friend of his and embarked for San Francisco, California.