How many troops and naval ships and bombers were required to invade each beach?

Answer 1

Initially a division(approx 12,000 men) was assigned to each beach. But the combat arms(infantry, combat engineers, and tanks) landed in waves of 1,000 men or more. The commander on the beach or on the ship dictated where follow up waves were landed to exploit breakthroughs(German Artillary and machinegun fire was very accurate and you didn't want to many troops concentrated in a small area to prevent excessive casualties).The allies had 3 armies waiting to unload in the 5 beaches in Normandy on D-Day, not counting the 3-Airborne Divisions keeping German Reeinforcements in the area from reaching the beaches. I have read that along with the allied armada's initial shelling, that each divsion that landed had a destroyer assigned to it to provide direct and close support along the beaches, even destroying machinegun nest and towed artillary blocking the beaches. Bombers didn't play a major part in supporting the landing because the bombadiers became nervous about friendly casualties and dropped their ordinance behind the German defenses. I do believe that fighter support would have been invaluable along the beaches.