Read Steve Zaloga's paper in the JMH.G
Gold-Beach - 5x 'Resistance Nest' defensive positions in 5 miles.
Utah Beach - 9x 'Resistance Nest' defensive positions in 5 miles.
The main reasons were a. Not wanting to burden themselves with the logistical burden of a new range of vehicles, b. No time to develop similar vehicles base on a US chassis and c. Not Invented Here.
“Debunking an Omaha Beach Legend: The Use of ‘Armored Funnies’ on D-Day,” by Steven J. Zaloga, Journal of Military History 85:1 (January 2021): 134–62
Why were casualties on Omaha Beach on D-Day so high? Many accounts assert that the unusually high casualties suffered can be traced to the U.S. Army’s refusal to employ specialized tanks developed by the British army, nicknamed “Armored Funnies.” This article examines the roots of this legend and details American and British plans for employing specialized tank support for Operation Neptune in June 1944. It concludes that the U.S. Army did not refuse to employ the Armored Funnies, but that delivery of some of these specialized tanks did not occur in time due to British shortages. This episode highlights the difficulty of attempting to harmonize military equipment and tactics in time-constrained joint operations. Journal of Military History | The Society for Military History