2006年2月3日,美国国防部正式发布了《四年防务评估报告》,对2001年以来的美国防务政策、经验教训作出了总结,并提出了面向2025年的美军转型目标。美国要“打一场长期战争”这份《四年防务评估报告》对“9·11”以来的反恐战争进行了评估和总结,对美国面临的威胁进行了重新定义,找出三大威胁,并以此为依据提出美 On February 3, 2006, the U.S. Department of Defense officially issued the “Quadrennial Defense Review Report”, which summarizes the U.S. defense policies, lessons learned and lessons learned since 2001, and proposes U.S. military transformation goals for the year 2025. The U.S. wants to fight a long-term war. The “Quadrennial Defense Review Report” evaluated and summed up the war on terror since the Sept. 11 attacks, redefining the threat faced by the U.S. and identifying three major threats. And based on this as a basis for the United States