In the following year, during al-Mu'tasim's expedition against Amorium, the Farghanan commander Amr al-Farghani was a leading officer in the caliph's army. While the campaign was underway, however, several Faraghina officers became involved in a plot to kill al-Mu'tasim and replace him with al-'Abbas ibn al-Ma'mun; when the plan was discovered by the caliph, the conspirators, including 'Amr, were rounded up and executed.