Whakaotihia te rerenga e whai ake nei: I te tau 1914 i tohua te wehenga ko te 7th Division hei waahanga o te whakariterite whanui o te National Guard. I te 29 o Hune 1916 i whakauruhia te wehenga 7 ki te mahi i Maunga Gretna ka tukuna ki El Paso, Texas, ki te mahi i te rohe o Mexico hei Regular
I uru atu te Tiriti whiu ki Mexico. Ko Major General Charles M. Clement te rangatira, e arahi ana i te Rōpū Tuatahi, ko te 1st, 2nd, me te 3rd Regiments, te Rōpū Tuarua te 10th, 16th, me te 18th Regiments, me te Rōpū Tuatoru te 4th, 6th, me te 8th Regiments. I reira ano hoki he reimana o te hoia eke hoiho me tetahi o nga patu, me nga kamupene e rua o nga hoia tohu me nga waahanga hauora. I whiwhi te puni i waho o El Paso i te taitara 'Camp Stewart' i muri i te Kaihauturu Matua, a Thomas J. Stewart. I te 19 o Mahuru, i tukuna tetahi parirau ki te kaainga. I te 14 o Whiringa-a-rangi, i wehe atu te 1st Artillery ki te kaainga; i wehe atu te 18th Infantry ki Pennsylvania i te 18 o Tihema; me te toenga o te wehenga i waenga i te 2-19 o Hanuere 1917. Te ahua nei ko te nuinga o te wehenga i whakauruhia ki waho o te ratonga 23 Hui-tanguru 1917 i Philadelphia.