President Obama said Saturday in Lisbon that he hopes to start relieving troops from Afghanistan by July.
Obama spoke at the two-day NATO summit where he spoke about his transition out of Afghan goals, which he wants complete by 2014, the Washington Post reported.
Pakistan backed the NATO timeline but cautioned the timeline because of security concerns.
Pakistan is crucial for the U.S. because its border areas are sanctuaries, and training grounds for al Qaeda and the Taliban, Reuters reported.
Some NATO countries are planning to start giving up security responsibility according to a timeline like Obama's. The Netherlands already have, and Canada is planning on changing from combat to training roles.