Obama had pledged to stop the war which has has cost over 2,000 US lives and wounded and maimed tens of thousands of other individuals.
But by late next year, now or early 2017 the 45th US president is sworn in and when Obama steps down, troop amounts are anticipated to be about 5,500, a senior administration official said.
Under preceding strategies, the usa would have drawn down its troop numbers to about 1,000 from about 10,000 now by the end of 2016.
Recent extreme fighting has underscored the continued function of American troops in critical counterterror operations and in training the still fledgling Afghan forces.
Two weeks ago the Taliban scored their largest military triumph since the 2001 US-led invasion, seizing the city of Kunduz.
Just a speedy reaction by US-trained Afghan security forces caused an ultimate Taliban retreat.