This is from The Economist:

…. In a display of unexpected warmth, Abiy Ahmed, Ethiopia’s new prime minister, embraced Issaias Afwerki, the ageing Eritrean dictator. In the Eritrean capital, Asmara, which no Ethiopian leader had visited since the war, the two pledged to normalise relations, putting an end to one of Africa’s most bitter conflicts. “There is no border between Ethiopia and Eritrea,” Mr Abiy declared in a televised address. “Instead we have built a bridge of love.”

After a long war for independence, Eritrea seceded from Ethiopia in 1993, following the toppling of the former Marxist regime and a referendum. Ethiopia was the largest trading partner of the newly independent Eritrea. With the first gunshots, though, centuries of commerce abruptly ceased. Lucrative potash deposits straddling the border have since been neglected. Eritrea’s enormous potential for tourism—a sparkling coast and, in Asmara, one of the continent’s most beautiful cities with a wealth of Art Deco buildings—has been mostly squandered. Renewed ties with its much larger neighbour now offer Eritrea’s ailing economy prospects of revival. Ethiopia has already promised to buy a 20% stake in Eritrea’s national airline.

The piece dividend from the end of the Ethiopia-Eritrea war will extend beyond the two countries. Eritrea has been linked to armed groups in Somalia and Ethiopia. Egypt has considered Eritrea as a check on Ethiopia. And Sudan has seen tensions rise with both Eritrea and Egypt as it has drawn closer to Ethiopia.