D-Day surprise.

One of the reasons that the Allies were successful on the D-Day invasion was that they surprised the German forces when the weather was bad. The Invasion had to be launched in favorable weather conditions which were a full moon which meant high tide and non choppy waters in the English Chanel. The invasion was set for June 5th but weather conditions ont the 4th and 5th clearly didnt make it possible for a landing. The 6th did have better conditions but were not the best. Knowing that the conditions had to be almost perfect for the Allies, many German officers and personal took a weekend break from Normandy and went on a mini vacation thinking that the invasion would be aborted for another month. On June 5th Eisenhower proceeded with the invasion without the favorable conditions that would allow the air force to bomb the landing sites before the invasion but this took the Germans by surprise. Even German officer Erwinn Rommel was away from the invasion on temporary leave, this really allowed for the allies to take advantage of the lack of instruction on the German side. This surprise really helped in the success of the Allies taking the Normandy beaches.