D-Day

Abstract

Nazi-occupied Europe was ripe for an allied invasion, but the big question remained: when? Just doing the weather forecast was a daunting endeavor. The first requirement was to pick a day with a full or new moon to have low water levels that would make spotting submerged barricades easier. Second, the day should have two low tides because the invasion would be staged in two waves. Third, there should be a mild breeze from the sea that would prevent the Germans from using gas. And then, of course, there should be no rain, neither in England from where most of the heavy equipment would be shipped nor on the French coast.