John Eisenhower, a diplomat, military historian and son of former president Dwight D. Eisenhower, died Saturday at his Trappe, Md. home. He was 91.
The death was announced by the office of Defense Secretary Chuck Hagel, the New York Times reports. Though tied to the legacy of his father, John Eisenhower was a prominent historian who penned books on World War I, The Mexican War and the Battle of the Bulge in World War II.
The only surviving son of the former president, John Eisenhower also served as an Army officer in World War II and the Korean War before serving as a national security adviser during his father’s second term as president.