- poland doesn't have a late summer, instead, it rains like hell
- british scout planes over Norway arrive later over the german battlefleet that's waiting for the rest of the ships to catch up, and thus sees them heading north, not west. as a result, the british fleet to the south and the battleship Renown to the north don't sail westwards, instead close in and destroy the german battlefleet
- Germany gets working torpedos into their U-Boats in time for Norway
- the finns don't wipe out 2 russian companies without a single casualtie, and finnish morale colapses in the early stages of the war
- german paras at Eben Emael fail in their mission
- DeGaulle gets caught and ends his days in german captivity
- enigma machine is not captured by the allies
- Luftwaffe bombers don't accidentaly drop their bombs over a London suburb, not giving Churchill a reason to bomb Berlin, not giving Hitler a reason to get mad
- american aircraft carriers are in port on dec 7th
- american radar operators notify their superiors that an enemy formation is closing on their position an hour before the attack
- the captain of the destroyer that sunk the jap mini-sub notifies command
- Nagumo launches the 3rd wave
- in the battle of the coral sea, the jap commander doesn't send his best pilots into a night attack, thus has more pilots, and the attack the following day manages to sink the Yorktown (or more fighters manage to save one or both jap carriers from being crippled)
- jap intel realises that every US outpost sending an uncoded distress call on the same day (for different reasons) days before Midway is a trap
- US dive-bombers at the Battle of Midway don't get lost and arrive on time, beeing cut to pieces by the zeros, or get totally lost and don't find the jap carriers at all
- the british commander doesn't act on inteligence reports and places his mines across the entire defense line at Tobruk
- Monty's precursor doesn't die in his plane, en-route to HQ
- winter of 41 is the mildest in history
- in the days prior to D-Day there are no storms, and so Rommel doesn't go back home for his wife's birthday (and a lot more senior officiers are present)
- Hitler can't sleep before D-Day
- (surpisingly nobody said it before) von Stauffen puts both bombs in the briefcase, without arming the second, since it would explode due to the explosion of the first
or
meetings are still held in the bunker and thus the closed space gets everyone in the room killed when the bomb goes off
- allies close the falaise gap
- weather in england is far better in time for Market Garden
or
- it's far worse
- 101'st is not deployed in the Ardennes, but near the swiss border