War of 1812
Clay assumed the leadership of those who urged resistance to the unjust and overbearing encroachments of Great Britain, and he more than any one else was instrumental in overcoming opposition and forcing a declaration of war. This war—a second war for independence, which changed this country from a disjointed confederacy liable to fall asunder, to a compact, powerful, and self-respecting Union—will ever be regarded as one of the crowning glories of his long and brilliant career. He proved more than a match in debate for Randolph, Quincy, and other able advocates for peace. When asked what we were to gain by war, he answered, "What are we not to lose by peace? Commerce, character,—a nation's best treasure, honor!"
In answer to the arguments that certificates of protection authorized by Congress were fraudulently used, his magnificent answer, "The colors that float from the mast-head should be the credentials of our seamen," electrified the patriots of the country. There is but a meagre report of this great speech, but the effect produced was overwhelming and bore down all opposition. It is said that men of both parties, forgetting all antipathies under the spell of his eloquence, wept together. Mr. Clay's first speech on entering Congress was in favor of the encouragement of domestic manufactures, mainly as a defensive measure in anticipation of a war with Great Britain; arguing that whatever doubts might be entertained as to the general policy of encouraging domestic manufactures by import duties, none could exist regarding the propriety of adopting measures for producing such articles as are requisite in times of war. If his measure for the increase of the standing army had been adopted in time, the humiliating reverses on land during the early part of the war would have been averted. He carried through a bill for the increase of the navy, and the brilliant naval victories of the war of 1812 followed. In the debate on the bill to provide for a standing army, it was argued that twenty-five thousand could not be had in the United States. Clay aroused the people of Kentucky to such enthusiasm that fifteen thousand men volunteered in that State alone, and members of Congress shouldered their muskets and joined the ranks.