Ethiopian Tigray War By axeljackson2008 Period: 2018 to 2020 Prime Minister implements waves of reforms Apr 2, 2018 Abiy Ahmed sworn as prime minister Jul 8, 2018 Ethiopia and Eritrea sign a peace treaty 2020 Tigray War starts Nov 4, 2020 Abiy Ahmed declares military offensive. Nov 4, 2020 Tigray Regional Forces launches surprise attack.