The leaders of Ethiopia and Eritrea signed a declaration on Monday, saying that the state of war between the two countries is over.
A peace deal ending the 1998-2000 border conflict had never been fully implemented and there had been tension between the neighbours.
But the countries declared an end to hostilities Monday and agreed to re-establish trade and diplomatic ties.
Family members divided by the war were able to telephone each other for the first time since the war. The developments followed a landmark meeting between the two countries’ leaders in Eritrea’s capital, Asmara.
The summit between Eritrea’s President Isaias Afewerki and Ethiopia’s Prime Minister Abiy Ahmed marked the first time the countries’ heads of state had met for nearly two decades.