That article is highly misleading – the amphibious aspect of D-Day, Operation Neptune, was a predominantly Royal Navy operation:
Of the 4,126 landing craft and landing ships deployed, 3,261 were British.
Of the 1,213 warships engaged 892 were British.
Of the 195,700 naval personnel involved; 112,824 were from the Royal Navy and another 25,000 from the Merchant Navy.
The naval operation was commanded by Admiral Sir Bertram Ramsay, Royal Navy which the article does concede.
Vessels were also supplied by the Dominion navies, mostly Canada, Free France, Poland and the Netherlands. I've probably left out a few.
The article mentions British and other involvement but mixes up the figures in several categories in a very misleading way. For example, for Neptune it lists nine battleships/monitors – of these three were American (Arkansas, Nevada and Texas); it lists 23 cruisers – there were 25 of which three were American; 80 fleet destroyers are listed of which 19 were American; there were 139 escorts, including the destroyers – 40 of these were American; one of three minesweeping squadrons was American; not sure where the 1,123 landing craft number comes from.
So, although the US obviously devoted massive resources to the operation, and to other theatres, and obviously eventually provided the preponderance of forces which liberated Europe, please let's not forget that D-Day was an Allied operation to which others contributed massively and not just an American effort.