* Africa: The African continent was also a major theater of war during World War I. The fighting took place in German East Africa (modern-day Tanzania), German Southwest Africa (modern-day Namibia), and German Kamerun (modern-day Cameroon).
* Asia: The fighting in Asia was primarily concentrated in the Pacific Ocean, where the Japanese Empire fought against the Allied Powers. The fighting also took place in China, where the Japanese invaded and occupied Manchuria.
* The Americas: The United States entered the war in 1917 and sent troops to fight in Europe. The US Navy also played a role in the war, patrolling the Atlantic Ocean and escorting convoys of Allied ships.