I knew you were oromo from the startIt doesn’t matter who it belonged to 500 years ago, when Hawiya came there 160 years ago it was Oromo land and had been for at least 200 years. I am guessing you are Issa who themselves migrated to the area just before Hawiya who even this day were booted out of a kebele in Mieso Somali district that they owned by Oromo, after 2004 when they decided to fight again
Also, no one allied with Oromo, they were always majority which the source I showed even mentions. Fact stands is Hawiye were the only ones who came out with a win, Issa Gurgura and Ogaden were all booted from the lands they expanded on while Hawiye at least kept more than half of it.
