However, those carriers were very effective in defending our Northern borders. There is no record of any invasion from that direction during World War II.
I think it was Heinlein who said that the bravest thing anyone ever did was signing up. When you sign up you put yourself under orders, and give up a lot of control.
After you have signed up, all anyone can do is follow through. The difference between returning as a live hero or a dead one is mostly luck. Eisenhower thought his career was ruined at the end of WWI when he hadn’t been permitted to go overseas because of his German sounding name, but he continued to follow through, and eventually was recognized for doing well.
Victory has a thousand fathers, but defeat is ever an orphan. Your father did his bit. My father was 8 when the war started and served in WWII by delivering papers. When the war was over, he was fired, so the returning veterans could have a job. He later served in the field artillery just after the Korean war, so I had a chance to be born at a stateside Army post. My sister was born at another post.
They did let the Canadians who served with the US in the 1st Special Service Force get by though. Good thing, as they helped train the shockingly green US soldiers of that unit. Later, US survivors of that units many battles stiffened the 45th Division, and the 1st Special Service Force commander (Robert T. Fredrick) ended his career with the Special Forces group fighting the Greek insurrection as a Major General with 7 or 8 Purple Hearts. The Special Forces insignia has a likeness of his V-42 commando knife on it.
But they had to go the long way around, all the way to Montana to avoid those aircraft carriers (and your dad).