Nonsense. Quite to the contrary, U.S. forces were required to end both WW1 and WW2 stalemates (Germany could not conquer Britain, Britain could not beat Germany).
Moreover, after the U.S. ended the first stalemate, the Europeans started up the whole nonsensical affair again a mere few short years after U.S. troops left Europe.
After we ended their second round of senseless war, we chose to keep our troops in Europe rather than bring them home; where they remain today (and as long as they've been there, the major European powers have behaved themselves).
"After we ended their second round of senseless war, we chose to keep our troops in Europe rather than bring them home; where they remain today (and as long as they've been there, the major European powers have behaved themselves)."
Yes, we in Europe are so glad of America's frequent disinterested intervention and for raising us all on to a much higher moral plane than that occupied by our antiquated political and religious systems.