As soon as the already existing difficulties with that country began to wear an ominous outlook, Farragut wrote to the Navy Department, asking for service in the Gulf. In his application he stated the qualifications he thought he possessed, from his knowledge and close study of the ground, and from his acquaintance with the Spanish language. He instanced particularly the occasions on which he had been employed in that neighborhood, and the close study he had been privileged to make on the spot during Admiral Baudin's operations. Although the Secretary of the Navy at that time was the able and enlightened Mr. George Bancroft, this letter received no reply; and a second, sent after the beginning of the war, was barely acknowledged without any action being taken. After Mr. Bancroft left the Department, Farragut renewed his application, expressing a decided opinion that the castle of San Juan de Ulloa could be taken either by artillery attack or by escalade; offering to undertake the task with the Pennsylvania and two sloops-of-war. If not thought to have rank enough for such a command, he was willing to go back to the position of executive officer of the Pennsylvania, in order, in that capacity, to organize the crew for the attack. The opinion thus expressed ran counter to the routine prejudices of the day, and, coming from an officer who had as yet had no opportunity to establish his particular claim to be heard, rather hurt than improved his chances for employment. It was not till February, 1847, nearly a year after the war began, and then with "much difficulty," that he obtained command of the sloop-of-war Saratoga; but when he reached Vera Cruz in her, the castle had already passed into the hands of the United States, having surrendered to the forces under General Scott on the 26th of March. That this capture should have been made by the army rather than by the navy was a severe disappointment to Farragut, who had so long cherished the hope that its fall should have been the brilliant achievement of his own service. In his mortification he used an expression which, in the light of his own subsequent career, seems a twofold prophecy. "The navy would stand on a different footing to-day if our ships had made the attack. It was all we could do, and should have been done at all hazards. Commodore Conner thought differently, however, and the old officers at home backed his opinion; but they all paid the penalty--_not one of them will wear an admiral's flag_, which they might have done if that castle had been taken by the navy, which must have been the result of an attack." It was to such enterprise at the hands of the men of his own time, among whom he was foremost, that the navy at a later day did obtain the admiral's flag which it had so long in vain desired.