During World War II he served briefly in the Navy as a lieutenant commander, winning a Silver Star in the South Pacific. After six terms in the House, Johnson was elected to the Senate in 1948. In 1953, he became the youngest Minority Leader in Senate history, and the following year, when the Democrats won control, Majority Leader. With rare skill he obtained passage of a number of key Eisenhower measures. The other crisis arose from Viet Nam. Despite Johnson’s efforts to end Communist aggression and achieve a settlement, fighting continued. Controversy over the war had become acute by the end of March 1968, when he limited the bombing of North Viet Nam in order to initiate negotiations. At the same time, he startled the world by withdrawing as a candidate for re-election so that he might devote his full efforts, unimpeded by politics, to the quest for peace.