First Nagorno-Karabakh War
In the end, on 9 May, Mamedrafi Mamedov, who was the Azerbaijani Defense Minister, signed; the next day, his Armenian counterpart Sarkisian did in Yerevan, as well. On 11, Samvel Babayan, who was the Karabakh Armenian commander, gave consent in Stepanakert and finally at midnight on 11 and 12, the ceasefire was put into effect.