The Imperial Japanese Army was the official ground-based armed force of the Empire of Japan from 1868 to 1945. It was controlled by the Imperial Japanese Army General Staff Office and the Ministry of the Army, both of which were nominally subordinate to the Emperor of Japan as supreme commander of the army and the Imperial Japanese Navy. Later an Inspectorate General of Aviation became the third agency with oversight of the army. During wartime or national emergencies, the nominal command functions of the emperor would be centralized in an Imperial General Headquarters (IGHQ), an ad hoc body consisting of the chief and vice chief of the Army General Staff, the Minister of the Army, the chief and vice chief of the Naval General Staff, the Inspector General of Aviation, and the Inspector General of Military Training.

The Battle of Wake Island was a battle of the Pacific campaign of World War II, fought on Wake Island. The assault began simultaneously with the attack on Pearl Harbor naval and air bases in Hawaii on the morning of 8 December 1941 (7 December in Hawaii), and ended on 23 December, with the surrender of American forces to the Empire of Japan. It was fought on and around the atoll formed by Wake Island and its minor islets of Peale and Wilkes Islands by the air, land, and naval forces of the Japanese Empire against those of the United States, with Marines playing a prominent role on both sides.

The island was held by the Japanese for the duration of the Pacific War theater of World War II; the remaining Japanese garrison on the island surrendered to a detachment of United States Marines on 4 September 1945, after the earlier surrender on 2 September 1945 on the battleship USS Missouri in Tokyo Bay to General Douglas MacArthur.