I think there were over 4oo MOH during WWII!!
Yeah, but only 5 on D-Day? I recall the subject came up when Capt. Dick Winter, E/506 PIR, was put in years later for the MoH for the assault on Brecourt Manor. The Army said in effect, “Sorry, there was already an MoH awarded to a member of the 101st ABD.” Do Capt. Winter had to be content with his DSC (not that I think he much cared one way or the other).
The Army and Marines were handing out MoH’s like door prizes during the Spanish-American War. But perhaps there weren’t other medals for valor available at the time. I know the MoH was pretty much “it” during the US Civil War.