This edition of Concepts and Programs offers a review of our operations in 2009, underscoring how engaged America's Marine Corps has been -- not only in Iraq and Afghanistan but around the world, on training exercises and in support of the engagement strategies of our country's combatant commanders. For the Marine Corps in 2010, this volume provides a snapshot of how we have structured the force to support our roadmap for the future, Marine Corps Vision and Strategy 2025. We intend for Concepts and Programs to also be a concise, useful reference of all our major programs.