World War II begins and the Germans succeed in invading Poland and France, but their forces are restrained some by the British; the submarine war increases its crescendo thanks to new French bases.

With war now declared by the US, naval forces throughout the states have joined to bring convoys of supplies across the Atlantic Ocean to the Allies in England; German U-Boats come through and manage to destroy some of ships along the way.

The Japanese are ascendant as they successfully invade the East Indies, Singapore and the Philippines; but the Americans are victorious, first on the Coral Sea and ultimately on Midway as they manage to bomb and sink four of Japan's aircraft carrier.

World War II comes to the Mediterranean Sea as Italian, French and British naval forces struggle; British forces have the unenviable position of guarding the sea as they escort convoys from Gibraltar to Malta.

After training in Australia and New Zealand, the US Marines land on Guadalcanal; the US Navy suffers defeats by the Japanese Navy around the island-in an area called Ironbottom Sound.