 The Allies had a big intel advantage with Ultra. You've heard of Ultra, the code-breaking technology. So Eisenhower actually had a pretty good idea of German dispositions, which is, as you know as a military guy, quite helpful in your attack planning. So the invasion is planned as a two-pronged attack. So it's going to lead with airborne and glider operations. They're going to drop behind the beaches, seize key terrain, especially things like bridges and stuff like that to prevent German reinforcements when the attack begins.