The British saved the world during the Battle of Britain. The “so few”.
Meanwhile, the American peoples’ desire to avoid war ended up costing 10’s of millions of lives.
The delay also increased the number of American casualties once America did enter the war.
Irony. War is bad and should be avoided. Delaying going to war against evil is very costly.
The left will never admit to this.
Would it have made a dramatic difference if the US had declared war on Nazi Germany in 1940 rather than 1941? The US was totally unprepared for war, our Army was tiny, we had zero heavy tanks in service.