Who was a sailor and later a union naval caption and was highly honored for his feats of bravery and heroism and became a congressman after the civil war?

The individual you are referring to is John A. Dahlgren. He served as a sailor and later became a Union naval captain during the Civil War, where he was recognized for his bravery and innovative contributions to naval warfare. After the war, Dahlgren transitioned into politics and served as a congressman, reflecting his lasting impact on both military and civilian life.