Mitchell was subsequently posted to the British Army of the Rhine with the rest of the regiment, and then joined the King's African Rifles, and was posted to East Africa. Soon afterward, he saw action in Zanzibar with the KAR in breaking up disturbances between the island's Arab and African populations, which had begun during a general election and had descended into widespread rioting and clashes. He also participated in operations on the Northern Frontier District.
Mitchell was assigned to the British Army of the Rhine, then joined the King's African Rifles, and was posted to East Africa. He later participated in operations in Zanzibar, where he helped quell disturbances between Arab and African populations during a general election that had escalated into widespread rioting and clashes.  He also took part in operations on the Northern Frontier District.