This matter has been discussed in sufficient detail already in these pages. But it is worthy of note that the Confederate commanders who so strangely neglected their opportunities after the battle of Manassas, were not restrained by higher authority from the activity that was so obviously called for by the circumstances of the case, as Grant was after Donelson. They were free to act upon their own initiative, and had they been at that time, as they afterwards became, generals of fair military capacity they would have acted with vigor and promptitude and the future history of the war would very certainly have been quite other than it was.
The chief hope of the Confederates lay in the recognition of their independence by foreign governments and in a presumably probable alliance between themselves and the powerful nations of Europe. To promote that result they sent out two duly accredited ministers, the one to Great Britain and the other to France. The men selected for this service were James M. Mason of Virginia and John Slidell of Louisiana.
These envoys escaped through the blockade to Havana. There they embarked on the British mail steamer Trent. Captain Charles Wilkes, commanding the United States steam frigate San Jacinto, overhauled the Trent at sea, on November eight, and made prisoners of Mason and Slidell and their secretaries.
There is no doubt now that the act of Captain Wilkes was utterly lawless. But there is equally no doubt that it was dictated by a patriotic purpose. It was instantly and enthusiastically applauded throughout the North, and the Federal Congress, inattentive to international law or consequences, voted thanks to Wilkes for his conduct in the matter. However, there was the offended British government still to be reckoned with, and that government was at that time not very reluctant to pick a quarrel with the United States or to find a substantial excuse for recognizing Southern independence, and perhaps lending aid to the Southern arms.
The act of Captain Wilkes was denounced by the British Government, as an outrage upon British neutrality and a wanton trespass upon British sovereignty as represented by the Union Jack afloat over a British mail steamer. A demand was promptly made for the surrender of Mason and Slidell, and for an apology. There is no possible room for doubt that that demand was justified under the laws of nations and peculiarly so by the precedents of American contention, for it was in protest against precisely such sea seizures that this country had made war in 1812. But the people of the North were tremendously excited over an incident in which they greatly rejoiced, and it was in an extreme degree dangerous for the administration to contravene popular sentiment and to undo Captain Wilkes's work, by yielding to Britain's demands for the surrender of Mason and Slidell.
From beginning to end of the war there was perhaps no problem so perplexing as that which this controversy presented to Mr. Lincoln's administration to solve. To refuse Britain's demands was to invite instant war with the greatest naval power in the world, with the certainty that France, already eager, would join forces with Great Britain in recognizing the Southern Confederacy and supporting it in its assertion of independence. In that case all that the United States had done toward the establishment of a blockade of Southern ports would have been quickly undone by the appearance of overmastering British and French fleets on the Southern coasts, and very probably by the landing of British and French forces to aid the Confederates in their war against the Union. For when war is on nations do not stop at technical interference. They are apt to furnish men and guns in aid of the cause they have espoused. In any case a declaration of war between Great Britain and the United States—a declaration of war which the capture of Mason and Slidell very narrowly threatened—would have resulted in the raising of the blockade of every Southern port and the opening of the South to that free traffic in arms, ammunition and supplies which chiefly the South needed in order to accomplish its purposes.
Should the Government, on the other hand, yield to the British demand, it must encounter that highly inflamed popular sentiment which had compelled a congressional resolution of thanks to Captain Wilkes, and which—sanely or insanely—was disposed to twiddle its fingers at British or any other intervention in American affairs.
Mr. Seward, as Secretary of State, solved the matter by one of the most adroit diplomatic quibbles ever invented by an ingenious mind. He must surrender Mason and Slidell of course, otherwise war was on with England and France, the blockade was broken, the Confederacy was recognized and the establishment of a Southern Republic was an accomplished fact. On the other hand Mr. Seward must not without good and sufficient excuse yield one jot or tittle to English demands—even though those demands were supported by American precedents—lest he offend the "whip all creation" sentiment of the country.
Probably in all history no diplomat ever managed so delicate or so difficult a matter so skilfully as Mr. Seward did this. He carefully set forth the war rights of his country. He contended that Captain Wilkes had a right to capture the Trent as a vessel knowingly carrying contraband of war. But he explained that, as Captain Wilkes had released the vessel instead of bringing her into port as a prize, he had lost his rights and forfeited his claims. In summing up Mr. Seward said: "If I declare this case in favor of my own Government I must disavow its most cherished principles and reverse and forever abandon its most essential policy. We are asked to do to the British nation just what we have insisted all nations ought to do to us."
Mr. Seward's plea was a specious one, but it answered its purpose. It enabled him to avoid war with Great Britain and France without alienating from the administration the support of that sentiment of confident self-reliance in the country upon which enlistments and the success of the war depended. He surrendered Mason and Slidell, but he adroitly managed to represent his action rather as a new assertion of the old 1812 doctrine of American rights than as in any sense a surrender to a foreign nation's demand. Thus peace abroad was secured and popular sentiment at home was appeased; and after all the temporary detention of the two Confederate ministers had fully accomplished its purpose. By the time that they reached Europe official and public opinion in that quarter had so far changed that neither France nor England was any longer disposed to recognize the independent nationality of the Confederacy which had so conspicuously neglected its easy opportunity to compel recognition by an advance upon Washington after Manassas.