Short answers, pulled from the story.
The first recorded instance of a Broughton's Battle Royal took place in 1743 in London. This event featured eight bare-knuckle boxers fighting simultaneously under rules devised by Jack Broughton.
The New York State Athletic Commission outlawed battles royal in 1911. This ban marked a significant shift in the practice, which had previously been a frequent opening act for boxing and wrestling shows from 1870 to 1910.
The 2000 film adaptation of Battle Royale established that players must kill one another until there is a single survivor. Participants must also scavenge for weapons and items to survive on a remote island.
World Championship Wrestling held the largest battle royal in wrestling history known as the WCW World War 3. This event featured three rings and sixty wrestlers who would fight until a winner emerged.
Ralph Ellison wrote the 1952 novel Invisible Man which contains a powerful depiction of a battle royal. The novel highlights the cultural significance and dehumanizing nature of the spectacle.
The Battle Royale phenomenon became especially popular in the 2010s after spreading from Japan to the rest of the world. This period saw the concept influence video games such as Fortnite Battle Royale in 2017 and television series like Squid Game in 2021.