Following numerous protests against what was popularly labelled the "Vienna Diktat", Gigurtu's cabinet resigned on September 4, replaced within a few days by the monarch's rival Ion Antonescu. The Iron Guard, which had been plotting a "coup d'état" against Carol after September 3, negotiated a partnership with Antonescu, setting up the fascist-inspired National Legionary State (which was to crumble during Sima's 1941 rebellion). Reportedly, Gigurtu's decision to resign had been taken after the infuriated king told him to execute fifteen arrested Guardists, therefore aiding the rapprochement between Carol's opponents.