Just because some specific act tips the scales doesn't make it the sole reason for win. One soldier tipping the battle isn't the (only, or main) winner. That's

Just because some specific act tips the scales doesn't make it the sole reason for win. One soldier tipping the battle isn't the (only, or main) winner. That's not about US involvement, just your specific argument. Coming form Eastern Europe, we were liberated by Soviet army, Americans never touched our soil. But it was a brutal liberation, and what came afterwards was even worse. Russians bled the most, killed the most. They wouldn't probably win if left on their own though for reasons stated by others. And that's purely Europe. Add Pacific and rest of the world and the role of US is undeniable. How difficult is it to accept that there is no single state who can claim the throne, only a joint force. More interesting question for me is, if Japanese wouldn't do Pearl Harbor, how long it would take US to engage with Nazi Germany. Maybe far too long, US wasn't very keen to start open war. Maybe a critical window would be missed and invasion could be a failure.