The war will continue to be prosecuted with vigor as the best means of securing peace. It is hoped that the decision of the Mexican Congress, to which our last overture has been referred, may result in a speedy and honorable peace. With our experience, however, of the unreasonable course of the Mexican authorities, it is the part of wisdom not to relax in the energy of our military operations until the result is made known. In this view it is deemed important to hold military possession of all the Provinces which have been taken until a definitive treaty of peace shall have been concluded and ratified by the two countries.
The war has not been waged with a view to conquest, but, having been commenced by Mexico, it has been carried into the enemy's country and will be vigorously prosecuted there with a view to obtain an honorable peace, and thereby secure ample indemnity for the expenses of the war, as well as to our much-injured citizens, who hold large pecuniary demands against Mexico.
By the laws of nations a conquered country is subject to be governed by the conqueror during his military possession and until there is either a treaty of peace or he shall voluntarily withdraw from it. The old civil government being necessarily superseded, it is the right and duty of the conqueror to secure his conquest and to provide for the maintenance of civil order and the rights of the inhabitants. This right has been exercised and this duty performed by our military and naval commanders by the establishment of temporary governments in some of the conquered Provinces of Mexico, assimilating them as far as practicable to the free institutions of our own country. In the Provinces of New Mexico and of the Californias little, if any, further resistance is apprehended from the inhabitants to the temporary governments which have thus, from the necessity of the case and according to the laws of war, been established. It may be proper to provide for the security of these important conquests by making an adequate appropriation for the purpose of erecting fortifications and defraying the expenses necessarily incident to the maintenance of our possession and authority over them.
Near the close of your last session, for reasons communicated to Congress, I deemed it important as a measure for securing a speedy peace with Mexico, that a sum of money should be appropriated and placed in the power of the Executive, similar to that which had been made upon two former occasions during the Administration of President Jefferson.
On the 26th of February, 1803, an appropriation of $2,000,000 was made and placed at the disposal of the President. Its object is well known. It was at that time in contemplation to acquire Louisiana from France, and it was intended to be applied as a part of the consideration which might be paid for that territory. On the 13th of February, 1806, the same sum was in like manner appropriated, with a view to the purchase of the Floridas from Spain. These appropriations were made to facilitate negotiations and as a means to enable the President to accomplish the important objects in view. Though it did not become necessary for the President to use these appropriations, yet a state of things might have arisen in which it would have been highly important for him to do so, and the wisdom of making them can not be doubted. It is believed that the measure recommended at your last session met with the approbation of decided majorities in both Houses of Congress. Indeed, in different forms, a bill making an appropriation of $2,000,000 passed each House, and it is much to be regretted that it did not become a law. The reasons which induced me to recommend the measure at that time still exist, and I again submit the subject for your consideration and suggest the importance of early action upon it. Should the appropriation be made and be not needed, it will remain in the Treasury; should it be deemed proper to apply it in whole or in part, it will be accounted for as other public expenditures.
Immediately after Congress had recognized the existence of the war with Mexico my attention was directed to the danger that privateers might be fitted out in the ports of Cuba and Porto Rico to prey upon the commerce of the United States, and I invited the special attention of the Spanish Government to the fourteenth article of our treaty with that power of the 27th of October, 1795, under which the citizens and subjects of either nation who shall take commissions or letters of marque to act as privateers against the other "shall be punished as pirates."
It affords me pleasure to inform you that I have received assurances from the Spanish Government that this article of the treaty shall be faithfully observed on its part. Orders for this purpose were immediately transmitted from that Government to the authorities of Cuba and Porto Rico to exert their utmost vigilance in preventing any attempts to fit out privateers in those islands against the United States. From the good faith of Spain I am fully satisfied that this treaty will be executed in its spirit as well as its letter, whilst the United States will on their part faithfully perform all the obligations which it imposes on them.
Information has been recently received at the Department of State that the Mexican Government has sent to Havana blank commissions to privateers and blank certificates of naturalization signed by General Salas, the present head of the Mexican Government. There is also reason to apprehend that similar documents have been transmitted to other parts of the world. Copies of these papers, in translation, are herewith transmitted.
As the preliminaries required by the practice of civilized nations for commissioning privateers and regulating their conduct appear not to have been observed, and as these commissions are in blank, to be filled up with the names of citizens and subjects of all nations who may be willing to purchase them, the whole proceeding can only be construed as an invitation to all the freebooters upon earth who are willing to pay for the privilege to cruise against American commerce. It will be for our courts of justice to decide whether under such circumstances these Mexican letters of marque and reprisal shall protect those who accept them, and commit robberies upon the high seas under their authority, from the pains and penalties of piracy.
If the certificates of naturalization thus granted be intended by Mexico to shield Spanish subjects from the guilt and punishment of pirates under our treaty with Spain, they will certainly prove unavailing. Such a subterfuge would be but a weak device to defeat the provisions of a solemn treaty.