 The DuMont affiliation ending dates listed here are somewhat tentative in several cases; DuMont ended most operations on April 1, 1955, and honored network commitments until August 1956.Many stations in the early years of television affiliated with more than one network.There were not enough local stations in most cities for each of the four major networks to have an affiliate, leading to the four networks (as well as a number of smaller networks) to fight for air time.