However, American losses in that second front were horrendous.
No they weren't.
America was never exposed to the concept of "horrendous" losses during WW2.
I can't think of a single occasion during the war where the U.S. lost 10,000 men in a day. Can you?
The U.S. lost about 6,600 men on D-Day. That was one of the biggest one-day losses of the war for the U.S. (I'm open to any information on bigger single-day losses…).
Some comparisons …
The Axis had 6x more troops in Stalingrad than in Normandie. The Russians lost 3x more troops at Stalingrad than the U.S. lost in the ENTIRE WAR. And that was just one compaign. A campaign that the Russians won.
U.S. bombing in Normandy killed 2x as many French civilians as German soldiers.
For every 1 serviceman the U.S. lost in battle against the European Axis (including navy, but not merchant marine), the Soviets lost about 50. If we add civilian casualties (including Merchant Marine and Civilian Air Patrol) that number drops down to 49-to-1 compared to Russian soldiers, but then Russian civilian losses add another 50 to 100 losses for every U.S. military and civilian loss (depending on whether we count only those killed by direct military action vs. being massacred by non-military means, and on who's numbers you believe).
We can certainly discuss the contribution made by strategic bombing, and whether those resources could or could not have been applied more effectively elsewhere. But let's not mislead ourselves through ill-attention to the language we apply.
"Horrendous losses", as might be meaningful within a WW2 context, was something the U.S. never experienced. Some tough days, yes. Terrible personal experiences? Certainly. But horrendous losses? Oh please. We fought it through, smartly enough, using our industrial edge to very good effect, and never even scored a blip on the horrendous losses scale.
-Mark
(aka: Mk 1)