Somalia
In 1969, the President of Somalia was killed by a man whose clan had been hurt by his policies, and General Mohammed Siad Barre took over the country. Siad Barre built a huge army with help from the Soviet Union and when Ethiopia fell for the fourth time (this time because of a communist takeover) he invaded. The Soviet Union decided that Ethiopia was more important than Somalia and double-crossed Siad Barre, supplying huge amounts of weapons to Ethiopia. Some other countries including Cuba and Israel also sent help to Ethiopia, so in the end Siad Barre lost the war.