Before 1990, it was frequently argued that the case against the eight generals was based on forged documents created by the Abwehr, documents that deluded Stalin into believing that a plot was being fomented by Tukhachevsky and other Red Army commanders to depose him. However, after Soviet archives were opened to researchers after the fall of the Soviet Union, it became clear that Stalin actually concocted the fictitious plot by the most famous and important of his Soviet generals in order to get rid of them in a believable manner.