Although we know about the victory of the Allied Powers in the Battle of D-Day, there is much more to the amphibious assault on the beach than meets the eye . Gilles Perrault, the author of The Secret of D-Day, describes Operation Fortitude as the Allies' greatest triumph. Operation Fortitude was an elaborate plan of deception strategies intended to deceive and distract German military forces as to the date and location of the invasion of Normandy. Operation Bodyguard is considered one of the most successful military operations in the history of modern warfare. In this article, I will provide research on the foundations, discuss the level of deception, and shed light on the implementation of these formerly classified operations. Sun Tzu once said: “All war is based on deception. Therefore, when we are capable of attacking, we must appear incapable; when we use force, we must appear inactive; when we are close, we must make the adversary believe that we are far away; when we are far away, we have to make him believe that we are close. Hold our bait to attract the opponent, feign disorder and crush them. During the build-up to D-Day on June 6, 1944, the Allied nations launched Operation Fortitude; Codenamed Operation Bodyguard, the main objective of Fortitude/Bodyguard was to ensure that the Germans would not increase their military presence in Normandy. Allied forces achieved this successfully by attacking other German positions, particularly Scandinavia and Pas de Calais. The equally important task was to delay the German reserve force to prevent a potentially devastating Nazi counterattack. Operation Fortitude was divided into three main divisions; Fortitude North, Fortitude South and Fortitude South II. A three-pronged plan; Fortitude North was responsible for the creation...... middle of paper ...... are well known. Its fantastic success must be attributed to careful planning, implementation and execution of strategic deception. Even after the actual invasion, Fortitude South II kept the powerful 15th Army anchored in the Calais region, helping to prevent it from strengthening against the Allied breakthrough, until it was far too late. Operation Fortitude is considered a huge success, never before. such a campaign of deception was successfully orchestrated and ran smoothly. Operation Fortitude not only allowed Allied forces to establish control of Normandy and then escape and move west across Europe. Operations Fortitude and Bodyguard are considered among the most brilliantly planned and executed military operations in history and deserve recognition for their outstanding achievements and continue to be implemented and refined today..