They betrayed you because your moron leader Siad Barre refused the peace settlement they offered in favor of Somalia when we controled 99% of Ogadan.That dumbass Siad Barre wanted to go to Addis Abeba no matter what.
And no,the SNM(Somali National Movement) in the northwest started the rebellion against Siad Barre who was choking us politically as well as economically.What triggered the movement was that it was a lot of Isaaq youths that died in war of 1977 since the fiercests fighting was in our borders for no reason whatsoever.Then Siad Barre tried to settle a lot of his clan into our territories instead of the rich South.For Isaaqs the fight started from the late 1970's.The USC(United Somali Congress) in the south who joined the fight in the late 1980's was majority Hawiye and was started by Mohamed Farrah Hassan Aidid who was trained by SNM.