| 1/19/1920 | The Allies formally recognize the independence of Armenia. |
| 1/19/1920 | Tried in Constantinople in absentia, Behaeddin Shakir is sentenced to death and Dr. Nazim to fifteen years hard labor. |
| 1/21/1920 | Turkish Nationalist forces affiliated with Mustafa Kemal attack Marash. |
| 2/5/1920 | 10,000 Armenians are massacred in Marash. |
| 4/1/1920 | The Ittihadists distribute relief funds to party members in hiding in Turkey accused of crimes and to those who had fled to foreign countries. |
| 4/22/1920 | The United States of America officially recognizes the Independent Republic of Armenia. |
| 4/23/1920 | The Ottoman government in Constantinople announces that it will seek a new review by higher judicial bodies of the sentences against those tried by the courts martial. |
| 4/25/1920 | United States President Woodrow Wilson receives an invitation from the San Remo Conference to determine the borders of Armenia. |
| 5/1/1920 | The French and Turkish Nationalists agree to an armistice. |
| 6/22/1920 | Jemal Oguz, the murderer of the poet Daniel Varoujan and other Armenian intellectuals, escapes from custody with the assistance of the Military Governor of Constantinople. |
| 6/29/1920 | Five war criminals tried for the massacres in Erzinjan, all of whom had conveniently escaped from custody, are sentenced in absentia. |
| 8/5/1920 | The court martial condemns to death Nusret, vice-governor of Bayburt District. |
| 8/10/1920 | The Treaty of Sèvres is signed. According to articles 226, 227, 228, 229, 230 pertaining to the massacres, the Turkish government promises to hand over all documents and any persons requested by the Allies. Articles 88 and 89 recognize Armenia as a free and independent state. |
| 8/15/1920 | The Turkish Nationalist and Bolshevik forces form an alliance. |
| 11/22/1920 | President Woodrow Wilson presents his delineation of the borders of Armenia. A week later Armenia is partitioned by Turkish Nationalist forces and Sovietized by Russian Bolsheviks. |
| 11/25/1920 | Of 10,000 Armenians living in Hadjin (Hajen), only 480 survive a massacre by Turkish Nationalist forces. |
| 12/30/1920 | The trial on the massacres in Mosul begins. |
