On the 19th of July, Fremont and his corps of topographical engineers met Captain Sloat and thereafter co-operated with him. In the "Cyane," Commander Du Pont, Fremont was sent to San Diego with one hundred and fifty riflemen and that place was occupied. On the 30th of July, the "Congress" took possession of San Pedro, the port of Los Angeles, the seat of the Mexican government in California. About this time the command of the Pacific squadron devolved upon Captain Robert F. Stockton, who was not a whit less vigilant than his predecessors had been. Having all the California seaports, Captain Stockton planned an expedition against Los Angeles before the well-armed Mexican soldiers in the province could be brought together. He landed three hundred and fifty sailors and marines and established a camp at San Pedro. Captain Stockton's biographer says: "There were only about ninety muskets in the whole corps. Some of the men were armed with carbines, others had only pistols, swords, or boarding-pikes. They presented a motley and peculiar appearance, with great variety of costume. Owing to their protracted absence from home the supplies of shoes and clothing had fallen short, and the ragged and diversified colors of their garments, as well as the want of uniformity in their arms and accoutrements, made them altogether a spectacle both singular and amusing." The Mexican forces at Los Angeles outnumbered Captain Stockton's land forces three to one, so he resorted to a stratagem to deceive the enemy as to his force. A flag of truce having appeared on the hills, "he ordered all his men under arms and directed them to march three or four abreast, with intervals of considerable space between each squad, directly in the line of vision of the approaching messengers, to the rear of some buildings on the beach, and thence to turn in a circle and continue their march until the strangers had arrived. Part of the circle described in the march was concealed from view, so that to the strangers it would appear that a force ten times greater than the actual number was defiling before them. When the two bearers of the flag of truce had arrived he ordered them to be led up to him alongside of the artillery, which consisted of several six-pounders and one thirty-two-pound carronade. The guns were all covered with skins so as to conceal their dimensions except the huge mouth of the thirty-two-pounder at which the captain was stationed to receive his guests.... As his purpose was intimidation he received them with much sternness." They asked for a truce, but Stockton demanded and secured an immediate and absolute surrender, as the evident object of the Mexicans was to gain time. Stockton at once began his tedious march to Los Angeles, his men dragging the cannon through the sand. On the 12th of August, he received a message from the Mexican general, saying "if he marched on the town he would find it the grave of his men." He replied: "Then tell your general to have the bells ready to toll at eight o'clock in the morning. I shall be there at that time." He was as good as his word. The next morning he was joined by Fremont and his men, who had come up from San Diego and they entered Los Angeles unopposed. He organized a civil government for the entire state, with Major Fremont as the head of it, and returning to his ships sailed northward on the 5th of September, 1846. The news of these operations was sent to Washington overland by the famous scout, Kit Carson.
Meantime the other ships of the Pacific squadron were cruising along the coast and capturing everything with a semblance of Mexican ownership. But Captain Stockton was much disconcerted in October to learn that two Mexican generals, released on parole after the fall of Los Angeles, had gathered a force and were besieging the small garrison there. The "Savannah" at once went to the scene. At San Pedro it was learned that the garrison had been compelled to capitulate and was awaiting an American cruiser. Captain Mervine, of the "Savannah," landed a detachment of sailors and marines and began the march to the capital. He could not cope with the superior force and had to retire. Indeed nearly all the places captured by the active sailors seemed likely now to fall into the hands of the Mexicans again. The garrison at Monterey was threatened by an uprising of the people; the garrison at San Diego was besieged; Los Angeles was in the hands of the enemy, and the force at the enemy's camp at San Bernardino was getting stronger each day. But Captain Stockton was equal to all demands upon him and made up for inadequate forces by celerity of movement. Just when matters were most critical the naval forces learned of the repulse of General Stephen Kearny by the Mexicans under Pico. It was indeed with great difficulty that Kearny and his dragoons were rescued by the sailors from their invested position near San Bernardino.
Having got what men he could together, Captain Stockton determined to recapture Los Angeles. On the 29th of December, 1846, he began his march of 145 miles to the capital. There were no roads, but the route was through deep ravines, sand-hills, and deserts. The men were poorly armed and badly clothed, and there were few horses to assist in drawing the artillery. Never did an American commander have before him a more disagreeable prospect. The men, many of them without foot-covering, became worn-out in the march and begged to rest, but the captain insisted that they must go on, as the Mexicans were getting stronger every day. The men responded as best they could.
On the 7th of January, the intrepid Stockton found that the enemy was intrenched between him and the San Gabriel River. The Mexican general changed his mind and crossed the river with the object of interrupting the crossing. But Stockton would not be denied, and repulsed the enemy on every side, though outnumbered three to one. This was on the 8th of January, the anniversary of the battle of New Orleans. The next day he fought again, resisting three furious charges of the enemy. On the 10th he entered Los Angeles unopposed, and on the 15th he was joined there by Fremont and his corps. These seaports in California were not seriously harassed during the remainder of the war, but they needed to be garrisoned, while the whole coast required watching. A part of the squadron was sent south and also into the Bay of California. Before the end of 1847 every Mexican gun on the western coast, save those at Acapulco, had been silenced. Loreto, La Paz, Mazatlan, San Blas, Manzanilla, San Antonio, Guaymas, and Mulye fell to the squadron. Sometimes it only needed for a ship or two to appear before a town and it would surrender, but generally an assault or the appearance of a storming party on land was necessary. But the seamen and marines were always invincible in this part of the war, where they were entirely without aid from the army.
The most serious predicament in which the Americans found themselves in this Pacific Coast campaign was when Lieutenant Heywood, of the "Dale," with four midshipmen and twenty marines, were shut up in the Mission House at San José, a small village near San Lucas. He was surrounded by a large force before he knew it, and two of his midshipmen were taken unawares and captured by an enemy not known to be near. Lieutenant Heywood maintained himself from the 19th of November, 1847, till the 17th of February, 1848, when Commander Du Pont, in the "Cyane," came to his rescue. A party of ninety-four seamen and marines, under Lieutenant Rowan, went ashore and fought its way against six hundred Mexicans until they were defeated and Heywood and his men rescued. There was nothing after this on the western coast more serious than guerrilla forays.
The operations on the western coast were probably, in result, much more important than those of the home squadron in the Mexican Gulf and the Rio Grande River. But the latter squadron was the larger, and as it was in constant co-operation with the conquering armies which finally captured the capital of the country, much more has been heard of the doings of the fleet in the east, which was at first commanded by Commodore David Conner and then by Commodore Matthew C. Perry. The operations on this coast also came in for much criticism, for the various ships were filled with young men overflowing with valor and mad with desire of glory. They were also comparatively close to home and saw the newspapers from New York, Washington, and New Orleans. In these papers the army was accorded all the glory while the navy was almost ignored. This neglect rankled in the minds of the madcaps, and they blamed Commodore Conner, an officer of much experience and distinguished record, for not storming every fort and citadel near the coast instead of carrying out his instructions to maintain an efficient blockade of the ports and to co-operate with the army whenever possible. These duties, tiresome and inglorious as they seemed, were of the first importance to the scheme of the campaign, and they were performed with a patience which rose superior to weariness, sickness, and death. The duty required of the blockaders did not require much fighting, but the men were in danger of the coast fevers all the time, and hundreds died. And then at some seasons the fleet was likely to be blown ashore by the fierce "northers" which prevailed. Many accidents resulted during these storms, the most serious being the capsizing of the brig "Somers," Lieutenant Raphael Semmes (afterward commanding the Confederate ship "Alabama") commanding, and the loss of more than half her crew.
When the war began at Palo Alto, Commodore Conner was with his squadron off Point Isabel, at the mouth of the Rio Grande River. Not knowing the issue of the battle, five hundred seamen and marines were sent to strengthen the garrison at Point Isabel, where the army supplies were stored, while Captain Aulick, of the "Potomac," with two hundred men, pulled up the Rio Grande in boats for fifteen miles and until a junction with the army was established at Barita. At this time the squadron consisted of the frigates "Cumberland" (flagship), "Potomac," and "Raritan"; the steam frigate "Mississippi"; the sloops-of-war "Falmouth," "John Adams," and "St. Mary's"; the steam-sloop "Princeton"; and the brigs "Lawrence," "Porpoise," and "Somers." Before the close of the war some of these ships were recalled, at least one was wrecked, and the squadron was from time to time largely reinforced.
The squadron, now that war had begun, was ordered to blockade the ports of Matamoras, on the Rio Grande; Tampico, on the Tampico River; Alvarado, on the Alvarado; Coatzalcoalcos, on the river of the same name; Tabasco, on the Tabasco River; and Vera Cruz, on the Gulf. The rivers mentioned, except the Rio Grande, are mere creeks, not fit for vessels of any size, and their mouths simply open roadsteads. Vera Cruz was the only place with anything like a harbor. The ports in Yucatan, such as Laguna and Campeachy, were only visited for supplies of fresh meat. The State of Yucatan was not assisting in the war and did not need to be blockaded. By the time General Taylor took possession of Matamoras, Commodore Conner's fleet had been considerably augmented by the addition of the sloops-of-war "Germantown," "Albany," "Saratoga" and "Decatur"; the steamers "Spitfire," "Vixen," "Alleghany," "Scorpion" and "Scourge"; the brig "Truxton"; the gunboats "Reefer," "Bonita," and "Rebel." A little later, and just before the bombardment of Vera Cruz, the "Ohio," with seventy-four guns, joined, together with the bomb-vessels "Vesuvius," "Hecla," and "Stromboli." There were also a number of small steamers and gunboats to operate in shallow water. These constituted what was called the "mosquito fleet." With so formidable a fleet the sailors felt they were equal to anything, and whenever a larger part of it was operating at one place, it was difficult to restrain the men. The youngsters even thought Commodore Conner's prudence and conservatism to be timidity, and the writer has before him now a book written twenty-five years after these events, by one who was a midshipman on the flagship, and he quotes the familiar lines about daring to put things to the touch. All this was most unfair, but it indicated that the blue jackets of the Mexican War were buttoned over hearts that knew no fear.
The blockade of the Mexican ports that was maintained was not by any means a paper blockade. It was actual, and the very opposite of the merely formal closing of ports which the United States had so long protested against in other countries. The hardships of the men and officers were fearful and the casualties very great. The tediousness of the service was relieved now and again by daring expeditions into the rivers and ports, where boats were cut out and taken away from beneath batteries on shore. The record of such ventures shows that the navy in 1846 and 1847 was no whit inferior in dash to the one which made the flag glorious some years before in the war with England. One instance of such a venture is quoted from the "Recollections of a Naval Officer," by Captain William Harwar Parker. He was telling of the blockade at Vera Cruz in 1846. He says: "One of the finest fellows in the service I often met on Green Island. I allude to Passed Midshipman Hynson, of Maryland. He was drowned in the brig 'Somers,' when she capsized in the fall of this year. At the time of her sinking, Hynson had both of his arms bandaged and in a sling, and was almost helpless. It was said that when the brig sank he managed to get hold of a spar with another man, and finding it would not support two he deliberately let go his hold. It was like him. The way he happened to have his arm in a sling was this: While the 'Somers' was maintaining the blockade of Vera Cruz, a vessel managed to slip in—I think she was a Spanish schooner. The Mexicans moored her to the walls of the Castle of San Juan for safety; but the officers of the 'Somers' resolved to cut her out or burn her. Hynson was the leading spirit in the affair, though Lieutenant James Parker, of Pennsylvania, was the senior officer. They took a boat one afternoon and pulled in to visit the officers of an English man-of-war lying under Sacrificios Island. It was quite usual to do this. After nightfall they left the British ship and pulled directly for the schooner, which they boarded and carried. This, be it observed, was directly under the guns of the castle and the muskets of its garrison. The crew was secured, and finding the wind would not serve to take the vessel out, it was resolved to burn her. Her captain made some resistance, and the sentinel on the walls called out to know what was the matter. Parker, who spoke Spanish remarkably well, replied that his men were drunk and he was putting them in irons. The party then set fire to the vessel and got safely away with their prisoners. It was in setting fire to the schooner that Hynson got so badly burned."
In regard to the personal heroism shown by Hynson and others when the "Somers" went down, Lieutenant Raphael Semmes, in his book, "Service Afloat and Ashore During the Mexican War," said: "Those men who could not swim were selected to go into the boat. A large man by the name of Seymour, the ship's cook, having got into her, he was commanded by Lieutenant Parker to come out, in order that he might make room for two smaller men, and he obeyed the order. He was afterward permitted to return to her, however, when it was discovered that he could not swim. Passed Midshipman Hynson, a promising young officer, who had been partially disabled by a bad burn received in firing the 'Creole' a few days previously, was particularly implored to go into the boat. A lad by the name of Nutter jumped out of the boat and offered his place to Hynson, and a man by the name of Powers did the same thing. Hynson refusing both offers, these men declared that then others might take their places, as they were resolved to abide in the wreck with him. Hynson and Powers were drowned. Nutter was saved. When the plunge was made into the sea, Sailing-Master Clemson seized a studding-sail boom, in company with five of the seamen. Being a swimmer, and perceiving that the boom was not sufficiently buoyant to support them all, he left it and struck out alone. He perished—the five men were saved."