<prompt> Qedela umusho olandelayo: Owathola iziqu ngo-1915 eRoyal Military College, eSandhurst, uDempsey wathunywa njengelungu lesibili eRoyal Berkshire Regiment. Njengephoyisa elincane, walwa eWestern Front ngesikhathi seMpi Yezwe Yokuqala, lapho alimala khona, futhi wanikezwa iSiphambano Sezempi. Ngemva kwempi wakhonza e-Iraq phakathi  <response>: Ukuvukela kwase-Iraq ngo-1920, i-Iran phakathi neMpi Yombango YaseRussia, naseNdiya. 