The Rhineland Campaign refers to a series of military operations during World War II that took place in the Rhineland, a region in western Germany. This campaign began in March 1945, as Allied forces aimed to push back the German Army and secure the area, which was strategically important for advancing into Germany. The campaign involved significant battles and the use of combined arms tactics, including infantry, armor, and air support. The campaign culminated in the liberation of key cities, including Cologne and Düsseldorf, and contributed to the overall collapse of German defenses. By the end of March 1945, Allied forces had successfully crossed the Rhine River, marking a critical step toward the eventual defeat of Nazi Germany.