Ilyasa b. Muhammad quickly angered the neighboring Buyids under 'Adud al-Daula by arguing over some territory on the border of Kerman and Fars. Before invading Kerman, 'Adud made sure to win over members of Ilyasa's army.
Ilyasa b. Muhammad's conflict with the Buyids over territory near Kerman and Fars led to tensions that prompted 'Adud al-Daula to seek support from Ilyasa's army before launching an attack on Kerman.