 When Edsel Ford died of cancer in 1943, aged only 49, Henry Ford nominally resumed control of the company, but a series of strokes in the late 1930s had left him increasingly debilitated, and his mental ability was fading.Ford was increasingly sidelined, and others made decisions in his name.The company was in fact controlled by a handful of senior executives led by Charles Sorensen, an important engineer and production executive at Ford; and Harry Bennett, the chief of Ford's Service Unit, Ford's paramilitary force that spied on, and enforced discipline upon, Ford employees.