The U.S. Army and U.S. Marine Corps produce this document to guide ground forces in current and future counterinsurgency operations. The manual was updated in 2006 (the first time in twenty years) and again in 2014.
According to the 2006 press release, the manual noted that "although the military's purpose is to fight and win the nation's wars, today's Soldiers and Marines conducting counterinsurgency operations need to be prepared to perform additional tasks - not just kill or capture insurgents, but to be nation builders, assist in the rebuilding of infrastructure, and facilitate the establishment of local governance and the rule of law." General David Petraeus developed the 2006 guide as the basis for operations in Iraq and Afghanistan.
The 2014 update includes lessons learned over the past six years in Afghanistan.