...s time he lacked but a month of being twenty-two years of age, but he was a seasoned veteran, and knew thoroughly the art of warfare. He was born near Philadelphia, April 3, 1842, the second son of Rear-Admiral John Adolph Dahlgren , the noted naval officer, author and scholar. He was educated in Washington, entered the war in 1861 as a captain, and had distinguished himself time after time for bravery in action. In 1862 he ...