When his father Edsel, president of Ford, died of cancer in May 1943 (during World War II), Henry Ford II was serving in the Navy and unable to take over the presidency of the family-owned business. The elderly and ailing Henry Ford, company founder, re-assumed the presidency, though mentally inconsistent, suspicious, and no longer fit for the presidency position by most of the Company's directors. But for the previous 20 years, although he had long been without any official executive title, he had always had de facto control over the company; the board and the management had never seriously defied him, and this moment was not different. The directors elected him, and he served until the end of the war. During this period the company began to decline, losing over $10 million a month. The administration of President Franklin D. Roosevelt considered a government takeover of the company to ensure continued war production, but the idea never progressed to execution.
Henry Ford II left the Navy in July 1943 and joined the company's management a few weeks later. After two years, he assumed presidency of the business on September 21, 1945. Since it had been assumed that Edsel Ford would continue in his capacity as president of the company for much longer than turned out to be the case, Henry Ford II had received little grooming for the position, and he took over the company during a chaotic period; its European factories had suffered a great deal of damage during the war, and domestic sales were also in decline.