In 1960, Khan sent troops across the poorly-marked Durand Line into the Bajaur Agency of Pakistan in an attempt to manipulate events in that area and to press the Pashtunistan issue, but the Afghan forces were defeated by the Pakistani Tribals. During this period, the propaganda war from Afghanistan, carried on by radio, was relentless. In 1961, Daoud Khan made another attempt to invade Bajaur with larger Afghan army this time. However, Pakistan employed F-86 Sabres jets which inflicted heavy casualties against the Afghan army unit and the tribesmen from Kunar province which were supporting the Afghan army. Several Afghan soldiers were also captured and they were paraded in front of international media which in turn caused embarrassment for Daoud Khan.