Armenian genocide denial is the claim that the Ottoman Empire and its ruling party, the Committee of Union and Progress (CUP), did not commit genocide against its Armenian citizens during World War I—a crime documented in a large body of evidence and affirmed by the vast majority of scholars. The perpetrators denied the genocide as they carried it out, claiming that Armenians in the Ottoman Empire were resettled for military reasons, not exterminated. In the genocide's aftermath, incriminating documents were systematically destroyed, and denial has been the policy of every government of the Republic of Turkey, , and later adopted by the Republic of Azerbaijan, as of 1991. Borrowing arguments used by the CUP to justify its actions, denial of the Armenian genocide rests on the assumption that the "relocation" of Armenians was a legitimate state action in response to a real or perceived Armenian uprising that threatened the existence of the empire during wartime. Deniers assert the CUP intended to resettle Armenians rather than kill them. They claim the death toll is exaggerated or attribute the deaths to other factors, such as a purported civil war, disease, bad weather, rogue local officials, or bands of Kurds and outlaws. Historian Ronald Grigor Suny summarizes the main argument as "there was no genocide, and the Armenians were to blame for it". Denial is usually accompanied by "rhetoric of Armenian treachery, aggression, criminality, and territorial ambition". One of the most important reasons for this denial is that the genocide enabled the establishment of a Turkish nation-state. Recognition would contradict Turkey's founding myths. Since the 1920s, Turkey has worked to prevent official recognition of the genocide or even mention of it in other countries; these efforts have included millions of dollars spent on lobbying, the creation of research institutes, and intimidation and threats. Denial also affects Turkey's domestic policies and is taught in Turkish schools; some Turkish citizens who acknowledge the genocide have faced prosecution for "insulting Turkishness".