Ukraine will not receive F-16 fighter jets from its allies this year as hoped, a spokesman for the country’s Air Force said late Wednesday, confirming that, as expected, the advanced planes won’t play a role in the current counteroffensive.
However, American officials have said that Ukraine has identified only eight combat pilots — less than a single squadron — who speak English well enough to start a period of training expected to last at least a year.
If D-Day was reliant on eight fighters being operational in June 1945, I don't think the chances of success would be very high.
https://www.nytimes.com/2023/08/17/world/europe/ukraine-f16-jets-nato.html
I would add that D-Day involved what, 200k soldiers? While the eastern offensive at that time involved 3.5 million soldiers.
Ukraine has what, a couple hundred thousand Russian soldiers? Blunting the initial offensive and signing a peace treaty was always the best option for Ukraine itself.