On this day in history thousands of terrified young men looked into the void, and advanced up the beach, and into legend, anyway. Many are still there.
Operation Overlord was a massive amphibious assault on the beaches of Normandy by Allied forces in an effort to place the Third Reich in a two-fronted defensive battle. Despite massively fortified beach defenses, artillery, bunker & tunnel networks, pillboxes, you name it and all on the high ground, Allied forces advanced up a beach that had been converted into a killzone.
To borrow from another theatre, "Uncommon valor was a common thing."