#4. The Hart Foundation versus the British Bulldogs
WrestleMania III saw a fight between two teams that would lead the WWF into the future from the Golden Era into the New Era of wrestling. The Hart Foundation and the British Bulldogs would occupy main event spots for the company in the early 90s, at a time when the company would transition away from the stars of the 80s but before the company ushered in the Attitude Era.
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The Hart Foundation and the British Bulldogs essentially feuded from the end of April 1984 to late November 1987, with the Hart Foundation defeating the Bulldogs for the Tag Team titles on January 26, 1987.
The British Bulldog later join a reformed Hart Foundation stable in 1997, but the four men ended up relatively close. While Bret Hart and Jim Neidhart would remain close, as Jim married Bret's sister, the Bulldog pairing of the Dynamite Kid and the British Bulldog were cousins.
They would join the extended Hart wrestling family with the British Bulldog marrying another of Bret's sisters, Diana, and the Dynamite Kid being married to Bret's sister-in-law.