the 157th field artillery brigade was organized at camp gordon, ga, in september 1917. the initial commander was colonel earle pearce. originally composed of two direct-support 3-in/75mm regiments (320th and 321st) with a total of 48 gun in 12 firing batteries, a general support regiment (319th) with 24 6-in/155mm howitzers in 6 firing batteries, and a trench mortar battery with twelve 6-in mortars. the brigade trained on limited u.s. made pieces before deploying to europe. on 20 february 1918, brigadier general charles d. rhodes assumed command. the brigade sailed for europe on 19 may 1918, arriving in southampton, england on 31 may 1918, then moved to le havre, france, on 3 june 1918. on 4 june 1918, the brigade moved to la courtine, france, for training. on 19 august 1918, the brigade moved to the marbache sector in lorraine, rejoined the 82nd division and assumed command of the sector artillery on 22 august 1918. from 12–16 september, the brigade supported the st mihiel offensive. after the st mihiel operation stabilized on 17 september, the brigade moved to the rear with the division, serving in first army reserve from 26 september to 2 october. on 3 october 1918, the brigade assembled with the division near varennes-en-argonne before re-entering the line. from 6–31 october 1918, the brigade supported the division during the meuse-argonne offensive. on 25 october 1918, major general rhodes (promoted on 14 october) departed, leaving colonel pearce in command. on 31 october 1918, the division was relieved and the brigade remained in support of the 80th division until 6 november, before concentrating near les islettes on 10 november. on 3 november 1918, brigadier general daniel f. craig assumed command from colonel pearce. the brigade trained in the les islettes area (until 17 november) and then in the ste-menehould area before rejoining the 82nd division in prauthoy on 17 december. on 9 february 1919, the 307th trench mortar battery sailed from brest for the united states, with the rest of the brigade following in may from bordeaux. the brigade was demobilized at camp upton, ny, on 23 may 1919.