The enormous consequences of the terrorist attacks on September 11, 2001, have forced our nation to focus its efforts and resources on developing the new capabilities, structures, and procedures for homeland security. The purpose of this paper is to develop and recommend the terms of reference and appropriate roles for the Combatant Command for Homeland Security by using the National Guard as the "base piece" for this effort. The paper begins with a brief discussion of the different categories of military service in our nation. Next is a consideration of the missions, structures, and procedures for the National Guard that should be relied upon in this era of greater emphasis on homeland security. That consideration leads to a discussion of the state and national roles for the National Guard in homeland security. Finally, the paper discusses operational focus of the Combatant Command for Homeland Security. The paper concludes with other changes to consider as homeland security becomes a defining mission for the DOD.