Volume 112 of Terrorism: Commentary on Security Documents, Discerning President Obama's National Defense Strategy, makes available documents from the first fifteen months of the Obama administration that provide insights into its developing national defense strategy. Included are documents specifically relating to the U.S. Department of Defense and the nation's armed forces. Included is the February 2010 Quadrennial Defense Review Report of the Department of Defense, one of the most significant documents providing insight into the defense component of national security. General Editor Douglas Lovelace, an expert in U.S. military matters, elucidates the complexities of military spending and of counter-insurgency tactics. Also included are reports detailing the strategy and performance of government agencies involved in the security effort, such as the Department of Homeland Security. These reports shed light on internal department assessments as well as external evaluations. Finally, strategy documents produced by the U.S. armed forces describe the national security policy being implemented by the nation's senior military leaders. Researchers will benefit from the focused and comprehensive nature of these reports.