When readers and armchair historians think of underwater combat, they probably think of Navy SEALs first, but Force Recon Marines, especially in the Vietnam War, saw a lot of diving duties. Like most ...

On June 11, 1967, U.S. Marine Corps Cpl. David Boyer wrote a letter to his father, Elwood. “I’m writing this letter now in case I get blown away,” he wrote. His father had been worried about his son.

The generation that fought World War II has largely disappeared. The remaining Korean War veterans are glimpsing the twilight. The country’s soldiers, sailors, airmen and Marines who came of age in ...