On 31 May 1956, the UNC required that the NNSC fixed inspection teams be withdrawn from South Korean ports, as the U.S. believed North Korea was being rearmed avoiding NNSC inspection. This was opposed by North Korea in the Military Armistice Commission, but was effected on 9 June 1956. Following this, NNSC inspection teams in North Korea were withdrawn in the following days. From this time onward, NNSC activities were limited to recording information offered by both sides, and staffing levels were reduced. In January 1958 U.S. nuclear armed Honest John missiles and 280mm atomic cannons were deployed to South Korea, a year later adding nuclear armed Matador cruise missiles with the range to reach China and the Soviet Union.