WASHINGTON • The Pentagon is considering several options to reduce the number of troops in Afghanistan, including one that would shift to a narrower counterterrorism mission, the top U.S. military officer told Congress on Wednesday.

Gen. Mark Milley, chairman of the Joint Chiefs of Staff, did not disclose potential troop totals, but he agreed that leaving a minimal U.S. footprint in Afghanistan to battle terrorists is a potential move.

“We have multiple options, that’s one of them,” he said. The U.S. has about 13,000 troops in Afghanistan. About 5,000 of them are doing counterterrorism missions. The remainder are part of a broader NATO mission to train, advise and assist the Afghan security forces.

Members of the House Armed Services Committee pressed Milley and Defense Secretary Mark Esper on a number of issues during the hearing, including lawmakers’ demands for a hearing on whether the Pentagon deceived the American people about military progress during the 18-year war.

This week, a Washington Post report disclosed thousands of pages of documents revealing that government officials for years misled the public about failures in the Afghanistan War.

“The bottom line is that top military officials and civilian officials had known that the Afghanistan war has been unwinnable and have been misleading the American public for 20 years,” said Rep. Ro Khanna, D-Calif.

Rep. Adam Smith, D-Wash., the committee chairman, said hearings would be appropriate. ‘‘I do think it’s something that we should take a look at.”

The top U.S. commander for Afghanistan, Gen. Scott Miller, was to brief members of Congress on the progress in the war during a closed session later Wednesday.

After the Miller briefing, Sen. Tim Kaine, D-Va., a member of the Senate Armed Services Committee, said he is less interested in the Post report than in grappling with the Trump administration’s handling of peace talks with the Taliban.

He said his concern is that the Taliban may simply wait until after the last U.S. soldier leaves Afghanistan and then “try to run roughshod over everything.”

Esper, who testified alongside Milley, told the committee that the U.S. military must remain focused on the counterterrorism mission even as efforts are made to negotiate a peace deal with the Taliban.

“We have an important counterterrorism mission in Afghanistan,” he said. “That means we’ve got to make sure Afghanistan never becomes again a safe haven for terrorists that can strike the United States.”

Joint Chiefs chairman Gen. Mark Milley during a House committee hearing on Syria.

the associated press file