Aha.
So, being late to declare war equals a contribution that was "minimal at best"? I recommend you educate yourself on what British leaders at the time, say. . . Winston Churchill, thought of American involvement. Hint: he thought it was awfully important.
At the time of both wars, the USA was an isolationist country where there was a strong body of opinion against getting involved in European wars, of which there had been a semi-constant stream dating back to the fringes of recorded history.
Jason, you're not doing the reputation of the American educational system any favors. Please clarify more instead of posting inflammatory statements, like "minimal at best and for the most part inconsequential" when you have absolutely nothing with which to back them up.