Analysis of information sources in references of the Wikipedia article "Flag of the United States Virgin Islands" in English language version.
Legend states that a red cloth with the white cross simply fell from the sky in the middle of the 13th-century Battle of Valdemar, after which the Danes were victorious. As a badge of divine right, Denmark flew its cross in the other Scandinavian countries it ruled and as each nation gained independence, they incorporated the Christian symbol.