June 6th
The assault was conducted in two phases: an air assault landing of American, British and Canadian airborne troops shortly after midnight…
Followed by an amphibious landing of Allied infantry…
On five beaches – Utah, Omaha (American), Gold (British), Juno (Canadian), and Sword (British). Free French, Polish, and Commonwealth troops also landed.
It is my humble opinion that the best book to read if you want to learn about D-Day, and the liberation of France, isThe Longest Day by Cornelius Ryan. (The movie isn’t bad either.)