At the Armenian Revolutionary Federation 's 9th General Congress , which convened in Yerevan from September 27 , to the end of October 1919 , the issue of retribution against those personally responsible for organizing the Genocide was on the agenda . A task force , led by Shahan Natalie , working with Grigor Merjanov , was established to assassinate Talaat Pasha , Javanshir Khan , Said Halim Pasha , Behaeddin Shakir Bey , Jemal Azmi , Cemal Pasha , Enver Pasha , as well as several Armenian collaborationists , in a secret operation codenamed Operation Nemesis
Genocide
Armenian Genocide
Turkish courts-martial of 1919–1920