自2001年9月世界贸易中心大楼遭受恐怖袭击以来,美国陆军开始了适应反恐作战等“新型战争”要求的变革。陆军推进了彻底的改革,例如将由装备坦克和步兵战车的师改编为行动单位(UA)旅。这种旅既具有优势的战斗能力和独立作战能力,也具有优良的快速部署能力。 Since the terrorist attacks on the World Trade Center building in September 2001, the U.S. Army has begun to adapt to the requirements of the “new war” such as anti-terrorist operations. The Army advanced radical reforms, such as the conversion of a division equipped with tanks and infantry fighting vehicles to a mobile unit (UA) brigade. This brigade has both superior combat capabilities and independent combat capabilities, but also has excellent rapid deployment capabilities.