From the Introduction: "Nearly two decades have passed since the terrorist attacks on 11 September 2001 shocked the United States and the world. [...] Afghanistan, a known training ground and safe haven for the terrorist group led by Osama bin Laden, became the initial focus of military efforts to strike back. That distant, land-locked, mountainous country presented great challenges to planners and operators. The U.S. Army, Air Force, Marine Corps, and Navy overcame those obstacles to project power halfway across the globe and conduct an offensive, in concert with Afghan allies, which drove al-Qaeda into retreat and quickly toppled the Taliban regime that supported the terrorists. Having achieved that basic goal, national leaders remained concerned that the Taliban would reassert its influence in Afghanistan and al-Qaeda might emerge from the shadows yet again. [...] The United States Army, which was trained and equipped primarily for conventional combat, had to reorient its forces and its thinking for a complex, irregular war--just as it would in Iraq after 2003. The conflict evolved into the longest-running war in our nation's history, and is ongoing today. With this series of commemorative pamphlets, the U.S. Army Center of Military History aims to provide soldiers and civilians with an overview of operations in Afghanistan and to remember the hundreds of thousands of U.S. Army personnel who served there on behalf of their nation. These publications are dedicated to them."
CMH Pub 70-131-1; Center of Military History Publication 70-131-1
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