Mare Nostrum: operations in the Mediterranean from 1940-1942. Sea and sand: naval support plays a vital role in the Allied invasion of North Africa during 1942-1943. Beneath the Southern Cross: overlooked engagements in the Southern Atlantic. Magnetic North: the threat of invasion leads the U.S. to defend Alaska, while the Nazis target convoys to Murmansk. The conquest of Micronesia: Japanese and U.S. aircraft carriers square off near the Gilbert and Marshall islands. Melanesian nightmare: air support is critical to the brutal campaign to drive the Japanese from New Guinea.