The army were Also 85% Somalis, let them s try, they didn't had any urban city till Portuguese came, the Portuguese were shocked in what they say bunch of savages, meanwhile Somali had multiple cities and town the built the only city in Ethiopia with walls aka harari was built by SomalisHararis are also used by Ethiopianists to try seperate Adal From somalis but back then the walls weren't even built yet and hararis are a mix of all major groups including somalis.
The major ethnics in Adal are Somalis and Somali Adjacent peoples + other smaller groups like Afars.
Adal was multi ethnic like all empires however it was Somali at the end of the day. And Ahmad Gurey is 90% sure he's Somali. No other ethnic group has a stronger claim to the heritage of Adal that Somalis do. These Ethiopianists will use the most irrelevant tiny groups to hotep our states but it's all futile if you know even a little bit of horn history.