<span>-The migration of people from farms to the cities and the
-development of rail and steamboat transport.</span>
Operation Overlord was the code name for the Battle of Normandy, the Allied operation that launched the successful invasion of German-occupied western Europe during World War II. Operation Overlord happened simultaneously with the Normandy landings and the Operation Overlord and was a 1,200 plane airborne assault preceded an amphibious assault involving more than 5,000 vessels.
