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Today in World War II History—28 May 1944

British Adm. Sir Bertram Ramsay, Allied Naval Commander for D-day, and US Navy Rear Admiral John Hall, commander of amphibious operations, aboard command ship USS Ancon, 25 May 1944 (US National Archives)

British Adm. Sir Bertram Ramsay, Allied Naval Commander for D-day, and US Navy Rear Admiral John Hall, commander of amphibious operations, aboard command ship USS Ancon, 25 May 1944 (US National Archives)

75 Years Ago—28 May 1944: Countdown to D-day: Gen. Dwight Eisenhower sets H-hours for each force.

At 1800, Adm. Sir Bertram Ramsay orders “execute Operation Neptune,” announcing D-day (June 5) and H-hour for each force.

Allied naval units for D-day go into lockdown with no one permitted to leave ships or bases.