A U.S. delegation will present the government of Niger this week with detailed plans for shuttering two key American bases and withdrawing all troops, officials said, as the Biden administration moves after months of strained negotiations to comply with the African nation’s decision to terminate a valued counterterrorism mission.

Senior Defense Department officials, including Chris Maier, assistant secretary of defense for special operations and low-intensity conflict, and Lt. Gen. Dagvin Anderson, who oversees personnel matters on the Pentagon’s Joint Staff, arrived Tuesday in Niamey, Niger’s capital, and were set to begin talks with Nigerien officials Wednesday, officials said ahead of the meetings.