The officers who led the Union Army throughout all the stages of the civil conflict were in the main young men. This feature has been a distinguishing mark in nearly all the wars in which the American people have taken part, and with a few notable exceptions has been the rule in the leading military struggles of the world. Alexander the Great died in his thirty-second year. Caesar entered upon the conquest of Gaul at forty. Frederick the Great was the leading commander of Europe at thirty-three. Napoleon and Wellington, born in the same year, fought their last battle at forty-six years of age. On the exceptional side Marlborough's greatest victories were won when he was nearly sixty (though he had been brilliantly distinguished at twenty-two), and in our own day the most skillful campaign in Europe was under the direction of Von Moltke when he was in the seventieth year of his age. Washington took command of the Continental Army at forty-three. Lafayette was a major-general at twenty. Nathaniel Greene was a general officer in the military establishment of the Revolution at thirty-three, and entered upon his memorable campaign in the South at thirty-eight. Winfield Scott was but twenty-eight when he commanded at Chippewa and Lundy's Lane. Macomb was thirty-two when he gained the famous victory over Sir George Prevost at Plattsburg. Jackson was forty-seven when he won the decisive battle over Pakenham at New Orleans. On the other hand, Taylor was sixty-three when he conquered at Buena Vista, and Scott was sixty-one when he made his celebrated march from Vera Cruz to the Capital. Scott enjoys the rare distinction of having held high and successful command in two wars which were a full generation of men apart. In 1847 he commanded in Mexico the sons of those officers who aided in his brilliantly successful campaign against the British on the borders of Canada in 1814.