The rapid and brilliant successes of our arms and the vast extent of the enemy's territory which had been overrun and conquered before the close of the last session of Congress were fully known to that body. Since that time the war has been prosecuted with increased energy, and, I am gratified to state, with a success which commands universal admiration. History presents no parallel of so many glorious victories achieved by any nation within so short a period. Our Army, regulars and volunteers, have covered themselves with imperishable honors. Whenever and wherever our forces have encountered the enemy, though he was in vastly superior numbers and often intrenched in fortified positions of his own selection and of great strength, he has been defeated. Too much praise can not be bestowed upon our officers and men, regulars and volunteers, for their gallantry, discipline, indomitable courage, and perseverance, all seeking the post of danger and vying with each other in deeds of noble daring.

While every patriot's heart must exult and a just national pride animate every bosom in beholding the high proofs of courage, consummate military skill, steady discipline, and humanity to the vanquished enemy exhibited by our gallant Army, the nation is called to mourn over the loss of many brave officers and soldiers, who have fallen in defense of their country's honor and interests. The brave dead met their melancholy fate in a foreign land, nobly discharging their duty, and with their country's flag waving triumphantly in the face of the foe. Their patriotic deeds are justly appreciated, and will long be remembered by their grateful countrymen. The parental care of the Government they loved and served should be extended to their surviving families.

Shortly after the adjournment of the last session of Congress the gratifying intelligence was received of the signal victory of Buena Vista, and of the fall of the city of Vera Cruz, and with it the strong castle of San Juan de Ulloa, by which it was defended. Believing that after these and other successes so honorable to our arms and so disastrous to Mexico the period was propitious to afford her another opportunity, if she thought proper to embrace it, to enter into negotiations for peace, a commissioner was appointed to proceed to the headquarters of our Army with full powers to enter upon negotiations and to conclude a just and honorable treaty of peace. He was not directed to make any new overtures of peace, but was the bearer of a dispatch from the Secretary of State of the United States to the minister of foreign affairs of Mexico, in reply to one received from the latter of the 22d of February, 1847, in which the Mexican Government was informed of his appointment and of his presence at the headquarters of our Army, and that he was invested with full powers to conclude a definitive treaty of peace whenever the Mexican Government might signify a desire to do so. While I was unwilling to subject the United States to another indignant refusal, I was yet resolved that the evils of the war should not be protracted a day longer than might be rendered absolutely necessary by the Mexican Government.

Care was taken to give no instructions to the commissioner which could in any way interfere with our military operations or relax our energies in the prosecution of the war. He possessed no authority in any manner to control these operations. He was authorized to exhibit his instructions to the general in command of the Army, and in the event of a treaty being concluded and ratified on the part of Mexico he was directed to give him notice of that fact. On the happening of such contingency, and on receiving notice thereof, the general in command was instructed by the Secretary of War to suspend further active military operations until further orders. These instructions were given with a view to intermit hostilities until the treaty thus ratified by Mexico could be transmitted to Washington and receive the action of the Government of the United States. The commissioner was also directed on reaching the Army to deliver to the general in command the dispatch which he bore from the Secretary of State to the minister of foreign affairs of Mexico, and on receiving it the general was instructed by the Secretary of War to cause it to be transmitted to the commander of the Mexican forces, with a request that it might be communicated to his Government.

The commissioner did not reach the headquarters of the Army until after another brilliant victory had crowned our arms at Cerro Gordo.

The dispatch which he bore from the Secretary of War to the general in command of the Army was received by that officer, then at Jalapa, on the 7th of May, 1847, together with the dispatch from the Secretary of State to the minister of foreign affairs of Mexico, having been transmitted to him from Vera Cruz. The commissioner arrived at the headquarters of the Army a few days afterwards. His presence with the Army and his diplomatic character were made known to the Mexican Government from Puebla on the 12th of June, 1847, by the transmission of the dispatch from the Secretary of State to the minister of foreign affairs of Mexico.

Many weeks elapsed after its receipt, and no overtures were made nor was any desire expressed by the Mexican Government to enter into negotiations for peace.

Our Army pursued its march upon the capital, and as it approached it was met by formidable resistance. Our forces first encountered the enemy, and achieved signal victories in the severely contested battles of Contreras and Churubusco. It was not until after these actions had resulted in decisive victories and the capital of the enemy was within our power that the Mexican Government manifested any disposition to enter into negotiations for peace, and even then, as events have proved, there is too much reason to believe they were insincere, and that in agreeing to go through the forms of negotiation the object was to gain time to strengthen the defenses of their capital and to prepare for fresh resistance.

The general in command of the Army deemed it expedient to suspend hostilities temporarily by entering into an armistice with a view to the opening of negotiations. Commissioners were appointed on the part of Mexico to meet the commissioner on the part of the United States. The result of the conferences which took place between these functionaries of the two Governments was a failure to conclude a treaty of peace.

The commissioner of the United States took with him the project of a treaty already prepared, by the terms of which the indemnity required by the United States was a cession of territory.