March 12, 2026

Perspectives: The Weight of War and Reclaiming Combat Agility

The United States Army is currently undergoing a transition and restructuring period, which historically occurs at the end of prolonged conflicts, such as World War II, the Vietnam War, and the Global War on Terror (GWOT). During this transition period, the U.S. Army seeks to, once again, modernize its force structure and conduct a thorough review of its doctrine. Many experienced combat leaders will inevitably retire or leave the military, creating a heavy reliance on doctrine and institutional learning to fill the gaps left by these experienced veterans. As the U.S. Army conducts force-modernization and doctrinal changes, an emphasis should be placed on combat agility regarding the mission-essential equipment soldiers are required to carry into combat. Over the last few decades, rucksacks, personal protective equipment, and vehicles have become increasingly larger and heavier, increasing the weight and bulkiness of a soldier's equipment. The increase in weight and bulk degrades the mobility, sustainability, and lethality of U.S. Army soldiers, as additional carried weight increases fatigue, elevates sustenance consumption, and significantly reduces their ability to maneuver quickly and over long distances on the battlefield. This article examines mobility, sustainability, and lethality, and it provides recommendations for consideration during the U.S. Army’s current transformation period.