During the 1992–93 Armenia-Azerbaijan war, CSI broke Azerbaijan’s blockade of the contested Nagorno-Karabakh territory numerous times to deliver humanitarian aid and document acts of violence against the Christian Armenian inhabitants of Nagorno-Karabakh. CSI also partnered with the Andrei Sakharov foundation to send aid to refugees from Nagorno-Karabakh. Witnessing the war on the ground, CSI published a detailed account of the First Nagorno-Karabakh War titled "Ethnic Cleansing in Progress: War in Nagorno Karabakh" co-authored by Cox with John Eibner.