Sec. 1 Purpose
(b) The Armed Forces of the United States have played a long and well-established role in securing our borders against threats of invasion, against unlawful forays by foreign nationals into the United States, and against other transnational criminal activities that violate our laws and threaten the peace, harmony, and tranquility of the Nation. These threats have taken a variety of forms over our Nation's history, but the Armed Forces have consistently played an integral role in protecting the sovereignty of the United States.
(c) Threats against our Nation's sovereignty continue today, and it is essential that the Armed Forces staunchly continue to participate in the defense of our territorial integrity and sovereignty. A National Emergency currently exists along the southern border of the United States. Unchecked unlawful mass migration and the unimpeded flow of opiates across our borders continue to endanger the safety and security of the American people and encourage further lawlessness. Accordingly, through this order, I am acting in accordance with my solemn duty to protect and defend the sovereignty and territorial integrity of the United States along our national borders.