The Battle of Morotai, part of the Pacific War, began on 15 September 1944, and continued until the end of the war in August 1945. The fighting started when United States and Australian forces landed on the southwest corner of Morotai, a small island in the Netherlands East Indies (NEI), which the Allies needed as a base to support the liberation of the Philippines later that year. The invading forces greatly outnumbered the island's Japanese defenders and secured their objectives in two weeks. Japanese reinforcements landed on the island between September and November, but lacked the supplies needed to effectively attack the Allied defensive perimeter. Intermittent fighting continued until the end of the war, with the Japanese troops suffering heavy loss of life from disease and starvation.

The 93rd Infantry Division was a "colored" segregated unit of the United States Army in World War I and World War II. However, in World War I only its four infantry regiments, two brigade headquarters, and a provisional division headquarters were organized, and the divisional and brigade headquarters were demobilized in May 1918. Its regiments fought primarily under French command in that war and saw action during the Second Battle of the Marne. They acquired the nickname Blue Helmets from the French, as these units were issued horizon blue French Adrian helmets. Consequently, its shoulder patch became a blue French helmet, to commemorate its service with the French Army during the German spring offensive.