The two nuclear superpowers both shot down their own satellites using sophisticated missiles in separate show of strength, the files suggest.
The American Government was so incensed by Chinese actions in space that it privately warned Beijing it would face military action if it did not desist.
The Chinese carried out further tests as recently as last year, however, leading to further protests from Hillary Clinton, the US Secretary of State, secret documents show.
Beijing justified its actions by accusing the Americans of developing an “offensive” laser weapon system that would have the capability of destroying missiles before they left enemy territory.
The disclosures are contained in the latest documents obtained by the Wikileaks website, which have been released to The Telegraph. They detail the private fears of both superpowers as they sought mastery of the new military frontier.