The 2001 global anti-terrorism coalition presents a new architecture which is dominated by the United States or a small group of nations that pressures other nations to follow the course it sets, and has a limited number of missions. This paper will not only argue whether 'empire' or 'semi-empire' structure of the coalition might gradually become more effective and legitimate over time, but also explore the possibility that the coalition could expand to tackle other transnational problems besides terrorism.