Encyclopaedia Britannica Presents: WWII Infographic Explainers: Normandy Invasion, overview

In May 1944, Allied forces in the UK prepared for the Normandy invasion, delayed by weather until June 6th. Troops landed on five beaches: Utah, Omaha, Gold, Juno, and Sword. Airborne units targeted key infrastructure. The German response was slow, partly due to deception tactics suggesting an attack at Calais. This allowed the Allies to establish a beachhead and expand it in the following days.

How many Allied troops went ashore on the morning of June 6th?

What factors contributed to the slow German response during the invasion?