Led by Fridtjof Nansen, the Commission for Refugees was established on 27 June 1921 to look after the interests of refugees, including overseeing their repatriation and, when necessary, resettlement. At the end of the First World War, there were two to three million ex-prisoners of war from various nations dispersed throughout Russia; within two years of the commission's foundation, it had helped 425,000 of them return home. It established camps in Turkey in 1922 to aid the country with an ongoing refugee crisis, helping to prevent the spread of cholera, smallpox and dysentery as well as feeding the refugees in the camps. It also established the Nansen passport as a means of identification for stateless people.