On August 3, 1918, Wittenmyer's brigade transferred to the Vesle Sector with the 77th Division, where it remained until August 13, when it took part in offensive operations to cross the Vesle River and advance to the Aisne River. The 77th Division then marched to the Argonne Sector, where it occupied defensive positions until September 25, when it took part in the Meuse–Argonne offensive.