Military teletypewriter systems

AT THE OUTBREAK of World War II there was a sudden and urgent demand by our Armed Forces and Government officials for accurate secret and reliable world-wide communication networks. These were required to permit close co-ordination between all echelons and to permit handling the stupendous traffic required in conjunction with tactical, supply, and administrative problems, as well as affairs of State. This challenge was met through efforts of Bell System engineers, working closely with the Armed Forces, by providing secret teletypewriter means of communication over wire-lines and radio networks on a world-wide basis.