Short answers, pulled from the story.
The History Channel opened its doors on the 1st of January 1995. The network began as a joint venture between A&E Television Networks and focused entirely on historical series and specials.
During the 2000s, the History Channel pivoted into reality television programming. This strategic change included broadcasting ancient alien conspiracy hypotheses alongside traditional history shows.
Stanley Kutner criticized the History Channel for the series The Men Who Killed Kennedy in 2003. Historians commissioned to review the documentary found issues with its accuracy.
In 2012, the Walt Disney Company purchased half of A&E while Hearst Communications bought the other half. This put History under their joint ownership as part of A+E Global Media.
The UK counterpart followed on the 1st of November 1995, in partnership with British Sky Broadcasting. International localized versions exist in India, Canada, Europe, Australia, the Middle East, Africa, Asia, and Latin America.