At which WrestleMania did WWE hold its first event outside the United States?

WWE held its first WrestleMania outside the United States at WrestleMania VI. The event took place at Toronto’s SkyDome in Canada on April 1, 1990.

The main event featured Hulk Hogan challenging The Ultimate Warrior for the WWF Championship. Warrior won the match and became the only wrestler at that event to hold both the WWF Championship and the Intercontinental Championship simultaneously.

WrestleMania VI was also notable for attracting one of the largest crowds in the series’ early history. WWE later staged WrestleMania events in other countries, including Canada again at WrestleMania X8 and Australia at WrestleMania 40 weekend events.