A generation has grown up since the close of the Rebellion, and there are those in this audience, I have no doubt, who do not understand the full meaning of this detested name. For their instruction, I want to add a few words concerning it. The underlying cause of the civil war was the affirmation of the right of secession. The Southern idea—and it was one that had been taught for generations—was that the States were sovereign; that a citizen’s first allegiance was due to his State; that the Union was a mere compact of agreeing States, from which any one or more had a right to withdraw whenever longer association was not desirable to it or them. The Northern idea was that the Union of the States constituted a Nation; that the Republic could not be broken up by one or more of the States; that a citizen’s first allegiance was due to the Nation; and that the interests of all the States were so indissolubly associated that the Republic had a sovereign right to protect them against attack by one or more of the States. Educated for generations to believe in the right of secession, it is not strange that Southern men who did not believe any real cause for a dissolution of the Union existed, went with their States when they determined to secede. Taught, from infancy, that their first allegiance was due to the State, it was not singular that they rallied to its standard when it called on them, and that, during four years of desperate war, they fought, with a courage and steadfastness that challenges the admiration of all men, for the idea, the principle, they had been educated to believe was right. But the men of the Northern States who sympathized with the Rebellion, and did everything in their power to promote its success, had no such excuse. Their conduct cannot be palliated or defended on any possible ground. If they believed in the Northern idea, that a citizen’s allegiance was due to the Nation, it was their plain duty to support the Union cause. If they believed in the Southern idea, that a citizen’s allegiance was due to his State, it was equally their plain duty to stand by and defend their own State and the cause it maintained. The most loyal man can, therefore, respect the motives of the men of Southern birth who followed their States. But what man, Northern or Southern, Union or Confederate, can respect the motives and actions of those malignant, crawling, venomous human reptiles known as “Copperheads”—the men of Northern birth and education who kept up a constant “fire in the rear” upon the soldiers from their own States, and whose conduct prolonged the war for years, made thousands of graves in the Southern valleys, and filled thousands of Northern homes—the homes of their neighbors and townsmen—with a grief whose shadow has never been lifted, even to this day.