Under the command of General John J. Pershing, the 42nd 'Rainbow' Division received a significant change in orders, redirecting its focus from further training at Rolampont to occupying the Baccarat sector in France. Pershing's decision was influenced by the demands of the ongoing conflict, where tactical flexibility was essential. The 42nd Division, comprised of soldiers from various states, was dubbed the 'Rainbow' Division due to its diversity and was known for its esprit de corps and adaptable combat skills.

Once the Rainbow Division was in place in the Baccarat sector, it became the first American division to assume complete control over an entire area of responsibility. This milestone demonstrated not only the growing capabilities of American troops but also marked a vital shift in the U.S. military's role on the Western Front, showcasing an evolution from support and auxiliary roles to more direct and substantial combat engagements. Over the next three months, the 42nd Division cemented its reputation and laid the groundwork for future operations by holding this sector longer than any other American division during the war.

The presence of the Rainbow Division in Baccarat not only helped secure that front but also allowed for the stabilizing of American and Allied lines, giving time for further troop deployments and strategy refinements. The successful occupation highlighted the importance of U.S. forces in the ongoing war, contributing significantly to the Allies’ efforts as they pushed back against Central Powers.