[7] Juan Álvarez and a group of Indian guerrillas were still in control of Guerrero as well as Acapulco, which were not reached by the French army in the early stages of the intervention.

Captain Le Bris asked for General Diego Álvarez, son of Juan Álvarez, and made several demands: that the Diamant be allowed to take on coal and water, that the General officially denounce the anti-French statements of the Italian-born Mexican officer Luis Ghilardi published in a local newspaper last year, which resulted in the repelling of the French warship La Bayonnaise, the removal of Ghilardi from his position and that all fort defenses be dismantled on sight.

At ¾9 am on the 10th a squadron under Rear-Admiral Bouët, consisting of the Diamant, the war steamer Pallas, and two corvettes the Bayonnaise and the Galathée,[4]: 87  approached the bay and was immediately opened fire at the forts.

Finally the French spiked some of the fort guns, throwing a number into the sea and returned to the ships and left the bay[6] to Siguantanejo, where they assessed the condition of Pallas and came to the conclusion that it was hit by about 15–16 shells in the hull and moved to Mazatlán dockyard for repair.

[10] The French captured three smaller boats and relieved the siege allowing American ships to dock in the harbor unless they unload passengers or goods.

In June 1864 General Juan Vicario attempted to break through the siege by 3000 Mexicans of Álvarez to the city but were seriously defeated and gave up that last effort.

[14] The evacuation was carried out by Captain Thomas Louis Le Normant de Kergrist, while Commodore Poor representing the American Navy offered 20 men to guard those inhabitants of the city who feared their safety.

[15] 1863 1864 1865 1866 1867 The success obtained by the Liberals in the state of Michoacán in the first half of 1865 had given several anti-imperialist party leaders the idea to push the center of resistance closer to Mexico and thus to trigger and benefit more of the local uprisings in the region.

Two of the ships of their squadron, Victoire and Lucifer, in Manzanillo took four hundred Mexican troops under the command of General Apolonio Montenegro, and on September 11, landed without opposition at Acapulco.

[20] However French troops requested a delay from the Republicans in February 1867,[21] while the commanding Imperialist General issued an emergency tax of $20,000 exclusively on the American citizens of the port to fund the costs of the evacuation and his own emigration and permanently left Acapulco along with his last 200 men[22] on the 19th to San Blas aboard the steamship Victoire.