García was a friend and comrade-in-arms of Miguel Grau, Manuel Ferreyros and Lizardo Montero, all of whom were known as the "Four Aces of the Peruvian Navy".

He visited various Peruvian and foreign ports and compiled information for his Sailing Route off the coast of Peru, until in 1862 he returned to the navy as commander of the brig Almirante Guise, being promoted to first lieutenant.

At that time, the Peruvian rearmament became urgent in the face of the threatening presence of the Spanish Pacific Squadron in South American waters.

In the port of Brest (France) he was joined by the Huáscar ironclad, commanded by José María Salcedo with whom he continued the journey in convoy.

When taking place the coup d'etat of the colonels Gutiérrez in July 1872, promoted the pronouncement in defense of the legal order; the respective document, signed by the naval officers, including Miguel Grau, José Melitón Rodríguez, Carlos Ferreyros and Manuel Melitón Carvajal, says the following The unprecedented abuse of force with which the Capital of the Republic was scandalized yesterday, had to meet, as indeed has happened, the most complete rejection on the part of the heads and officers of the Navy who subscribe, who are alien to all personal league, do not recognize any other rule of conduct than that issued or directed to the faithful compliance of the national institutions.

[3]The squad went to sea, and on board Independence, the elected president, Manuel Pardo y Lavalle, was transferred to Pisco, in order to safeguard it from the coup plotters.

In November 1872 he was appointed extraordinary envoy and plenipotentiary minister in the empires of Japan and China, to solve the incident caused by some coolies or Chinese workers who in Japanese port had escaped from the Maria Luz boat.

[4] When the War of the Pacific broke out in 1879, he was appointed Chief of the Second Naval Division of Peru, made up of the Union corvette , the Pilcomayo gunboat and the Oroya transport.

And with the support of Huáscar, he cornered and captured the Chilean transport Rímac, which was carrying troops and supplies to Antofagasta on June 23, 1879.

Through the official correspondence taken from Rímac, it was learned that the Chileans were waiting for a transport of arms and supplies that would come through the Strait of Magellan, so the Peruvian government entrusted Aurelio García to leave immediately with the Union to the southern tip of the continent, to interfere with such shipment.

Together with Antonio Arenas, he was one of the plenipotentiaries who, on behalf of Peru, participated in the failed peace conferences with Chile held aboard the American corvette Lackawanna, anchored in Arica, in October 1880.

The ministerial cabinet was made up of Andrés A. Cáceres, Pedro Alejandrino del Solar, Lizardo Montero and Manuel Galup.

He went to London, where through letters published in the pages of The Times (a daily friend of the Chilean cause) he denounced on the one hand the execrable performance of Chile during the war and on the other he exposed Peru's position on the peace projects.

He returned to Lima and assumed the management of a company financed by English investors, which was to exploit the La Unión mines, in Arequipa; but during an inspection trip to these sites, he was the victim of a sudden and serious illness.