Whakakiia te rerenga e whai ake nei: I te marama o Akuhata 1941, i whakahoutia te 1st Cavalry Division hei 10th Armoured Division. I noho tonu a Clark ki te whakahau tae noa ki te Paenga-whawha o te tau 1942 na reira i ngaro te mahi a te wehenga i Alam Halfa me te Pakanga Tuarua o El Alamein. I noho ia hei Kaiwhakahaere Whakawhitiwhiti korero a te GOC i Tunisia, a muri iho ko te Kaiwhakahaere Kawana o Sicily i muri i tana whakakorenga i te rohe o Haina.
i te tau 1943. I te mutunga o te 1943, i noho poto ia hei Kaiwhakahaere-Tianara-Tianara i te GHQ Middle East i Cairo i mua i tana noho hei Kaiwhakahaere Whakahaere Matua i te Tumuaki o nga Mana Whakahoahoa (AFHQ) i mau ai ia i te mana o te rangatira rangatira.