Throughout WWI, the Royal Navy sailed a fleet of 156 ... from the U.K. These were the HMAS AE1 and AE2, Australia's first military submarines. These were manned by British and Australian sailors ...

Capt. Nicholas Royer describes himself and many of his fellow Marines as "nerds with a drive for violence." It's an apt description for disciples of a booming craft in the Corps: war-gaming.

On the Pacific island of Guadalcanal in 1942, the famed 1st Marine Division — the oldest, largest and most decorated division of the U.S. Marine Corps — defeated Japanese forces in a turning ...