The U.S. closed five military bases in Afghanistan as part of an agreement signed with the Taliban more than four months ago, a U.S. official confirmed to Fox News.

The deal promised to withdraw all U.S. forces from the bases in the first 135 days, a milestone met on Tuesday, President Trump’s special representative to the talks, Zalmay Khalilzad, said.

"The U.S. has worked hard to carry out the 1st phase of its commitments under the Agreement, including to reduce forces & depart five bases. NATO troops have come down in proportional numbers," Khalilzad said on Twitter.