Rubuta ci gaba ga wannan sakin layi - A cikin 1920, an ba Marden umurnin sashin Birtaniya da ke mamaye Constantinople
Ka yi haƙuri. A lokacin Chanak Crisis na 1922 ya taka muhimmiyar rawa wajen sasanta yarjejeniyar zaman lafiya tsakanin dakarun Burtaniya da na Turkiyya, wanda daga baya ya sami lambar yabo. Ya koma gida a 1923 don zama GOC na 53rd (Welsh) Infantry Division, Tsarin Rundunar Sojoji (TA), kafin ya yi ritaya a watan Yunin 1927. Ya rike mukamin Kanal na bikin Welch Regiment daga 1920 zuwa 1941.