Short answers, pulled from the story.
The Cleveland Cavaliers joined the National Basketball Association as an expansion team in 1970. The franchise began play that year and started competing against teams like the Golden State Warriors immediately.
The Cleveland Cavaliers defeated the Golden State Warriors by a score of 142 to 109 on the 23rd of January 1989. This victory remains the franchise's largest margin of points scored against Golden State.
Cleveland secured its first franchise title by winning 93 to 89 in Game 7 of the 2015, 16 NBA Finals. LeBron James became the third player ever to record a triple-double in a Game 7 of the Finals and was unanimously voted Finals MVP.
Four straight NBA Finals occurred between these franchises from 2015 to 2018. The teams met for the third consecutive year in the 2017 Finals, marking the first time any two franchises had done so in North American professional sports.
The Golden State Warriors set an unprecedented regular-season record with 73 wins including a 24 to 0 start. Their dominance continued through the playoffs until they faced Cleveland in the 2015, 16 NBA Finals.