美国防部将国土防御列为首要任务

Core Viewpoint - The U.S. Department of Defense has released a new National Defense Strategy (NDS), prioritizing homeland security and emphasizing the need for allies to take on more responsibilities while increasing investment in the defense industrial base [3]. Group 1: National Defense Strategy Highlights - The NDS identifies homeland security as the primary task of the Department of Defense, stating that the Western Hemisphere has been a "neglected" area in past efforts [3]. - The document refutes any inclination towards "isolationism" and calls for greater responsibility from U.S. allies [3]. - Key measures for "defending the homeland" include ensuring border security, combating drug terrorism, and protecting airspace [3]. Group 2: Context and Background - The NDS aligns with the U.S. National Security Strategy report released in December 2025, which outlines President Trump's "America First" foreign policy and focuses on core national interests [3]. - The strategy reflects a shift in U.S. global security priorities following Trump's return to the White House [3].