In order to effectively plan and execute military operations in today's security environment, Regional Combatant Commanders require forces capable or planning and conducting missions across the range of military operations. Recent experience has shown that while U.S. forces are highly effective in high-intensity conflict against conventional enemies, they are somewhat less capable in low-intensity conflict against unconventional threats. By using the Soviet experience in Afghanistan, this paper identifies the dangers associated with a force unable to properly plan and execute operations against an unconventional opponent. The paper examines current U.S. military forces and defines three non-existing characteristics and resources needed for success in today's global security environment. It uses the United States Marine Corps as a model to identify changes currently underway, as well as areas for improvement. Finally, the paper makes recommendations that can be applied to all U.S. military forces, enabling successful operations in low-intensity conflict against unconventional threats while maintaining high intensity war fighting capabilities.