On 23 June, High Commissioner Admiral Calthorpe, realising the significance of Mustafa Kemal's discreet activities in Anatolia, sent a report about Mustafa Kemal to the Foreign Office. His remarks were downplayed by George Kidson of the Eastern Department. Captain Hurst of the British occupation force in Samsun warned Admiral Calthorpe one more time, but Hurst's units were replaced with the Brigade of Gurkhas. When the British landed in Alexandretta, Admiral Calthorpe resigned on the basis that this was against the Armistice that he had signed and was assigned to another position on 5 August 1919. The movement of British units alarmed the population of the region and convinced the population that Mustafa Kemal was right.