James Vincent Forrestal (1892–1949) was a prominent American financier and public servant who played a pivotal role in United States military administration during and immediately after World War II. Raised in a middle-class Irish Catholic family, Forrestal achieved early success as a Wall Street financier before transitioning to public service. In 1940, on the eve of American entry into World War II, he was appointed Undersecretary of the Navy, later ascending to Secretary of the Navy in 1944. In this role, he was tasked by President Franklin D. Roosevelt with leading the massive wartime buildup of the nation's naval forces.
Following the war, Forrestal was appointed by President Harry S. Truman in 1947 as the nation's first Secretary of Defense, overseeing the newly created Department of Defense. During his tenure, Forrestal was known for his intense hostility toward the Soviet Union and his concerns regarding Communist expansion in Europe and the Middle East. He advocated for naval battle groups centered on aircraft carriers and, alongside Secretary of State George C. Marshall, opposed U.S. support for the creation of Israel due to concerns over alienating oil-producing Arab nations.
Forrestal's tenure as Secretary of Defense was marked by policy disagreements with President Truman, which ultimately led to his forced resignation in 1949. Following his departure from office, his mental health rapidly declined, and he was hospitalized for depression. He died in May 1949 from injuries sustained in a fall from a window at Bethesda Naval Hospital. His legacy is honored through various namesakes, including the supercarrier USS Forrestal and the Department of Energy's headquarters.
