What type of strategy was used in the invasion of Normandy on d-day?

Spread and Focus Strategy. D-Day called for one of the most critical spread and focus strategies in history. The Allies needed an entry into Europe that would maximize their chances of success while minimizing the risk to lives and military assets.

To ensure a position of advantage on D-Day, Allied strategy called for keeping the German army too dispersed to mount an effective counterattack. The super-ordinate objective of the Normandy invasion was clear. The Allies sought total victory in Europe, culminating in the defeat of Hitler's last defenses in Berlin.