Italy,Italian Eritrea,Italian Somaliland were the three main nations involved with Italy
These were Italy's troops/army:
-royal Italian army
-Regia aeronautica (Royal Air Force)
-black shirt infantry
-Regia Marina (royal navy)
-royal corps of colonial troops
-Azebu Galla
-Yemenis troops

Ethiopia were originally going to be backed up by the League of Nations but they did nothing to help Ethiopia, so Ethiopia were on there own
Ethiopia's troops included:
-army of the Ethiopian empire
-imperial Ethiopian air force
-kebur zabagna (imperial guards)
-Belgian army
-rases (Ethiopian commanders)

Involved?