Why did Ethiopia become landlocked after 1993?

Ethiopia became a landlocked country in 1993 following the secession of Eritrea, which had previously served as Ethiopia's province along the Red Sea.1

The transition followed decades of conflict between the Ethiopian government and the Eritrean People’s Liberation Front (EPLF). After the EPLF assumed control of the region in 1991, the new government in Ethiopia supported the move toward Eritrean independence. This process was finalized through a referendum held in April 1993, in which the overwhelming majority of Eritreans voted for independence, leading to the official proclamation of the state of Eritrea on May 24, 1993.23