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How did the Allied forces prepare for the Normandy Invasion?

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American soldiers in helmets crouch inside a landing craft approaching a smoke-covered beach during the D-Day invasion of Normandy, June 6, 1944. — Normandy Invasion American assault troops in a landing craft during the Normandy Invasion, June 6, 1944.

The Allied forces meticulously prepared for the Normandy Invasion through a multi-faceted strategy. A significant element was Operation Fortitude, a large-scale deception campaign designed to mislead Nazi Germany about the invasion's true location. This involved creating a fictitious army, complete with fake tanks and aircraft, and using double agents to feed false information to the Germans.12

In addition to deception, the Allies conducted a massive air campaign. Between April and June 1944, Allied aircraft dropped nearly 200,000 tons of bombs on French rail lines, roads, and German military installations. This air superiority crippled German transportation networks, isolating the invasion area and preventing effective reinforcement. On the morning of D-Day itself, airborne troops were dropped behind enemy lines to secure key objectives, followed by naval bombardments and the main seaborne landings.34