UFC 194: Aldo vs. McGregor

The event stands as one of the most significant in UFC history. It was headlined by a Featherweight Championship unification bout between José Aldo and interim champion Conor McGregor. It became the most heavily promoted fight in UFC history, driven by a multi-continent world tour. McGregor knocked Aldo out in 13 seconds, ending a decade-long unbeaten streak. This was during a run that made McGregor the biggest Superstar in UFC history.