He qualifies through his Cambodian father who immigrated to the United States during the Vietnam War .
In 2011 , Armstrong was identified by the Football Federation of Cambodia as a foreign - born player who could potentially be called for the Cambodia national team .
Armstrong qualifies through Armstrong Cambodia Cambodian father who immigrated to the United States during the Vietnam War .
In 2011 , Armstrong was identified by the Football Federation of Cambodia as a foreign - born player who could potentially be called for the Cambodia national team .