The Ethiopian Empire

Derg revolt
When a Soviet-backed Marxist–Leninist military began revolting against the imperial government, many saw this as the end to the rule of the Solomon dynasty. The Derg offered the crown to Amha Selassie, and upon his return to the country was crowned. However a week later, the Derg government arrested in-prisoned the new emperor. This caused massive demonstrations and eventually armed revolt leading to the end of the Derg controlled regime after only seven months in power.

New Imperial Government
Not wishing to allow a group like the Derg to gain control of his country, Amha Selassie implemented major reforms paving the way for a democratic constitutional monarchy. Unfortunately, this also lead areas along the Red Sea to agitate for independence form the rest of the country. This movement for independence eventually lead to the Eritrean War of Independence.