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Overall hint
Units landing on
Commanders leading the attack
Answer
One of two American beaches, first from west.
4th Infantry Division
Gen. Walter Prosser, Raymond O. Barton, Theodor Roosevelt Jr.
Utah
The most known beach, second American, you land on it in Medal of Honor Frontline and Allied Assault, Saving Private Ryan starts with landing on this beach, most bloody one.
1st and 29th Infantry Divisions
Omar Bradley, Norman Cota, Clarence Huebner
Omaha
One of two British beaches, Polish airmen and fleet was helping there
49th and 50th Infantry Divisions
Douglas Alexander Graham
Gold
Overall hint
Units landing on
Commanders leading the attack
Answer
The only one Canadian, it had help from Free France and Norway(fleet)