According to the Joint Publication 3-27 Homeland Defense, the military roles are identified in the unity of effort for the U.S. government in the homeland security arena (Joint Chiefs of Staff, 2018).

The U.S. government has a number of resources and agencies at its disposal with responsibilities that support the fight against terrorism, security, emergency management, and public health.

The Posse Comitatus Act limits the government’s ability to domestically use the military due to legal considerations and specific limitations; however, the Department of Defense is the lead agency for defending against traditional external threats.

According to the Joint Publication 3-27 Homeland Defense, the military roles are identified in the unity of effort for the U.S. government in the homeland security arena (Joint Chiefs of Staff, 2018). Based on your review, create a holistic Homeland Security Enterprise (HSE) system that includes your dissertation theory in today’s field of operations that includes planning to combat terrorism, border security issues, international affairs, and the Department of Defense. Distinguish the area where your research would reside in the holistic HSE. In your paper, also identify whether the Department of Defense could support your dissertation theory. Support your research by identifying and citing additional sources that support your views.

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