mial42
Gone Fishin'
Personally I think only (1) is really a prerequisite rather than just helpful, and even (1) could be toned down to "US in the war but only halfheartedly/willing to negotiate." The Eastern Front was a close-run thing OTL, and an even luckier (I know...) or marginally more competent Germany or less lucky/competent USSR could turn the tide (or even just weaker WAllies, which will obviously result from no US entry, especially since a less belligerent US will be providing much less aid before joining in the first place). The British can't win by themselves and will run out of money to pay for needed imports without US assistance, although they won't really lose either. Not too likely a scenario, but far from impossible.