Whakakihia te rerenga e whai ake nei: I whakahokia te 2nd Maine ki te Ratonga Federal i te 18 o Pipiri 1916, a ka mahi i te rohe o Mexico me te United States i Texas ki te tiaki i nga whakaekenga kino. I te 13 o Paenga-whāwhā 1917, i whakakotahitia nga waahanga o te 1st New Hampshire Volunteer Infantry ki te 2nd Maine ki te hanga i te 103rd Infantry Regiment. I whakanohoia te puhi hou ki te 52nd Infantry Brigade (i te taha o te 104th Infantry Regiment) hei waahanga o te 26th Infantry Division, te "Yankee Division". I mahi te rerenga i te Runga o te Hauauru, a, ko ia tetahi o nga roopu Tiaki Motu tuatahi i te pakanga i te wa o te pakanga. I mahi te 103 i te pakanga o Champagne-Marne i reira i tino mohio ai ratou ki te whawhai, ka haere tonu ki te whawhai i roto i te
Ko Aisne-Marne. I haere tonu nga toto o New England ki te whawhai i te Pakanga o Saint-Mihiel, me te whakaeke nui a Meuse-Argonne, te mahi nui rawa atu me te toto rawa atu o te pakanga mo nga Ropu Whakangungu Amerika.