its called the
Butterfly Effect. So I suggest that you call it as such (since if you don't you'd probably lose marks) and diverge a bit more towards chaos theory.
Of course, you still need to use real world examples, so that navigation error is a good one, and another WW2 themed one would be the death of Glenn Miller as he flew across the channel to France in dense fog and (from piecing together various nuggets of information and guesswork together) appears to have been hit by bombs dropped by bombers on the return trip to the UK who needed to ditch the weight to make it back.
Oh, and don't forget the whole bombing of populated areas thing during the Battle of Britain which was partly because of bombers getting lost when sent to take out industrial targets during the night and hitting cities, which got a retaliation.
Last one, the
20th of July plot to kill Hitler (now made famous outside Germany by that Scientologist twit Tom Cruise in Valkyrie) which should have worked but failed out of sheer luck, basically.
Admittedly thats a lot of WW2 in there, so you'll want to find other examples. Just dont go too hypothetical and you should be fine.
good luck
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