The timing of d-day was important to the outcome because it allowed the allies to benefit from some really good luck. The German's were caught off guard, and w

The timing of d-day was important to the outcome because it allowed the allies to benefit from some really good luck. The German's were caught off guard, and were slow to respond. This reaction was hardly assured and may have been different if D-day had gone ahead later. It is interesting how some quite modest efforts contributed to this. For example, superior weather forcasting allowed the allies to exploit a weather window that the German's did not know about. It is interesting to ponder how things may have been different with less accurate data. And it demonstrates how vitally important detailed planning was.