Dead heat! Second round of voting! (Patreon)

In the last poll 'Fall of the USSR' and 'Suez Crisis' got exactly the same number of votes (I think in future I will hold back my vote to settle dead heats, but this time I had already voted - for North Korea, since you ask, but hey ho). So we need a second round of voting to decide the winner.

Poll ends 12.00 GMT on Sunday...