Short answers, pulled from the story.
Led Zeppelin formed in August 1968 with guitarist Jimmy Page, vocalist Robert Plant, bassist John Paul Jones, and drummer John Bonham. The group evolved from the Yardbirds after Page secured support from manager Peter Grant to create a new lineup following the final gig on the 7th of July 1968.
The untitled fourth album became one of the most recognizable images in rock history due to its cover featuring four symbols representing the members instead of text or title. By 2021, the record had sold 37 million copies worldwide making it one of the best-selling records ever.
Led Zeppelin played before 76,229 people at the Pontiac Silverdome in Michigan establishing the largest indoor concert crowd ever recorded by Guinness Book of Records standards. This event occurred during the mid-1970s when the band set multiple attendance records while facing off-stage problems.
Led Zeppelin disbanded following the death of drummer John Bonham who died from asphyxiation from vomit at 1:45 pm on the 25th of September 1980 after consuming alcohol heavily. The remaining members declared they could not continue without him due to a deep sense of undivided harmony felt by themselves and manager Peter Grant.
Page Plant and Jones reunited for the Live Aid concert at JFK Stadium in Philadelphia on the 13th of July 1985 playing a short set with Tony Thompson and Phil Collins sharing drum duties. They appeared again on the 14th of May 1988 for Atlantic Records 40th Anniversary concert with Jason Bonham filling his father's position.