That French demagogue whom Victor Hugo aptly called Napoleon the Little was a prime factor in the history of the Union and the Confederacy. The Confederate side of his intrigue will be told in its proper place. Here, let us observe him from the point of view of Washington.
It is too much to attempt to pack into a sentence or two the complicated drama of deceit, lies, and graft, through which he created at last a pretext for intervention in the affairs of Mexico; it is enough that in the autumn of 1862 a French army of invasion marched from Vera Cruz upon Mexico City. We have already seen that about this same time Napoleon proposed to England and Russia a joint intervention with France between North and South--a proposal which, however, was rejected. This Mexican venture explains why the plan was suggested at that particular time.
Disappointed in England and Russia, Napoleon unexpectedly received encouragement, as he thought, from within the United States through the medium of the eccentric editor of the "New York Tribune". We shall have occasion to return later to the adventures of Horace Greeley--that erratic individual who has many good and generous acts to his credit, as well as many foolish ones. For the present we have to note that toward the close of 1862 he approached the French Ambassador at Washington with a request for imperial mediation between the North and the South. Greeley was a type of American that no European can understand: he believed in talk, and more talk, and still more talk, as the cure for earthly ills. He never could understand that anybody besides himself could have strong convictions. When he told the Ambassador that the Emperor's mediation would lead to a reconciliation of the sections, he was doubtless sincere in his belief. The astute European diplomat, who could not believe such simplicity, thought it a mask. When he asked for, and received, permission to pass the Federal lines and visit Richmond, he interpreted the permit in the light of his assumption about Greeley. At Richmond, he found no desire for reunion. Putting this and that together, he concluded that the North wanted to give up the fight and would welcome mediation to save its face. The dreadful defeat at Fredericksburg fell in with this reasoning. His reports on American conditions led Napoleon, in January, 1863, to attempt alone what he had once hoped to do supported by England and Russia. He proposed his good offices to the Government at Washington as a mediator between North and South.
Hitherto, Washington had been very discreet about Mexico. Adroit hints not to go too far had been given Napoleon in full measure, but there was no real protest. The State Department now continued this caution and in the most polite terms declined Napoleon's offer. Congress, however, took the matter more grimly, for throughout the dealings with Napoleon, it had been at odds with Lincoln. It now passed the first of a series of resolutions which expressed the will of the country, if not quite the will of the President, by resolving that any further proposal of mediation would be regarded by it as "an unfriendly act."Napoleon then resumed his scheming for joint intervention, while in the meantime his armies continued to fight their way until they entered Mexico City in June, 1863. The time had now come when Napoleon thought it opportune to show his hand. Those were the days when Lee appeared invincible, and when Chancellorsville crowned a splendid series of triumphs. In England, the Southern party made a fresh start; and societies were organized to aid the Confederacy. At Liverpool, Laird Brothers were building, ostensibly for France, really for the Confederacy, two ironclads supposed to outclass every ship in the Northern navy. In France, 100,000 unemployed cotton hands were rioting for food. To raise funds for the Confederacy the great Erlanger banking-house of Paris negotiated a loan based on cotton which was to be delivered after the breaking of the blockade. Napoleon dreamed of a shattered American union, two enfeebled republics, and a broad way for his own scheme in Mexico.
In June an English politician of Southern sympathies, Edward Roebuck, went over to France, was received by the Emperor, and came to an understanding with him. Roebuck went home to report to the Southern party that Napoleon was ready to intervene, and that all he waited for was England's cooperation. A motion "to enter into negotiations with the Great Powers of Europe for the purpose of obtaining their cooperation in the recognition" of the Confederacy was introduced by Roebuck in the House of Commons.