Whakaotihia te rerenga e whai ake nei: I waenga i te Haratua me te Tihema 1916, i whakahoutia te 13th (Western) Rōpū me te whakahou i te whakarite mo te taraiwa ki te raki ki te hopu i a Baghdad. I te Hōngongoi, i whakaarahia a Major-General Maude ki te whakahau i te whakarahi me te whakaingoa i te Mesopotamian Expeditionary Force. I tona waahi, ko te Brigadier General Cayley, ko te rangatira o te 39th Brigade, i whakaarahia hei rangatira mo te wehenga. I te 12 o Tihema 1916, i ahu whakamua te wehenga mai i Sheik Sa'ad i Kut. I te
Ko te Pakanga Tuarua o Kut, i awhina te wehenga ki te peia i nga ope Ottoman mai i te taone. Whai muri i te wa poto, ka rere te wehenga ki te raki, ka whiti i te awa o Diyala, ka uru ki te hopu i Baghdad i te 11 o Poutu-te-rangi 1917. Whai muri i te hopu o Baghdad, i whawhai te 13th (Western) Division i etahi pakanga ki te whakakaha i te mana o Ingarangi ki runga i te vilayet o Baghdad. Kei roto i tenei ko te whawhai i Dellis Abbas (27 ki te 28 o Poutu-te-rangi 1917), Duqma (29 Poutu-te-rangi 1917), Nahr Kalis (9 ki te 15 o Paenga-whawha 1917), te haerenga o te Adhaim (18 Paenga-whawha 1917) me te mahi a Shatt al 'Adhaim (30 Paenga-whawha 1917). Ahakoa te koretake o nga Ingarihi ki te anga whakamua, i whawhai ano te wehenga i te Tuarua me te Tuatoru o Jabal Hamrin (16-20 Oketopa 1917 me 3-6 Tihema 1917).