From the link on my previous post. Its was started on 2012.
The U.S. drawdown in Afghanistan began 13 July 2011 when the first 650 U.S. troops left Afghanistan as part of Obama's planned drawdown.
[42][43][44] The units that left were two Army National Guard cavalry squadrons: the 1st Squadron,
134th Cavalry Regiment, based in Kabul, and the 1st Squadron,
113th Cavalry Regiment, which had been in neighboring
Parwan province.
[42]
The United States and its
NATO allies finalized agreements on 18 April 2012 to wind down the war in Afghanistan by formalizing three commitments: to move the Afghans gradually into a lead combat role; to keep some international troops in Afghanistan beyond 2014, and to pay billions of dollars a year to help support the Afghan security forces.
[45][46][47]
On 2 May 2012, Afghan president
Hamid Karzai and U.S. president Barack Obama signed a strategic partnership agreement between the two countries, after the U.S. president had arrived in
Kabul as part of unannounced trip to Afghanistan on the first anniversary of
Osama bin Laden's death.
[48] The
U.S.–Afghanistan Strategic Partnership Agreement, officially titled the "Enduring Strategic Partnership Agreement between the Islamic Republic of Afghanistan and the United States of America",
[49] provides the long-term framework for the relationship between Afghanistan and the United States of America after the drawdown of U.S. forces in the Afghanistan war.
[50] The agreement went into effect on 4 July 2012.
[51]
After the signing of the strategic partnership agreement Obama laid out his plans to end the war in Afghanistan responsibly. The plans call for 1) the removal of 23,000 US troops at the summer end of 2012, i.e. at the end of September 2012;
[52] 2) Afghan security forces to take the lead in combat operations by the end of 2013 while
ISAF forces train, advise and assist the Afghans and fight alongside them when needed; and 3) the complete removal of all U.S. troops by the end of 2014, except for trainers who will assist Afghan forces and a small contingent of troops with a specific mission to combat al-Qaeda through counterterrorism operations
