The next day, on the 14th, crown prince Assfa Wossen went on the radio to announce the coup and the formation of a new government and a pay raise for the armed forces. Whether he did this willing or by force has remained a topic of controversy. Marcus points out that it was to his “advantage to cooperate…he could always claim, if the coup failed, that he had acted under mortal threat.” The conspirators hoped the crown prince’s speech would buy them the support of the Army and the Air Force while also gaining support from the populace of Addis Ababa. However, the speech did not have the intended effect. Most felt that the crown prince gave the speech under duress. Imperial Body Guard troops, the majority of whom learned for the first time that they were fighting against the emperor when they heard the radio broadcasts, lost their will to fight. By this time the Air Force had decided to join the group loyal to the emperor. Troops were being recalled and were pouring into Addis Ababa. Another important player in town were the Americans. The conspirators asked that the new government be given recognition by the United States government. However, the Americans were also in contact with the loyalist camp and had not yet decided on which side they would give support.
(bron: https://thehaileselassie.com/)