FILE - In this Wednesday, March 2, 2016 file photo, new U.S. commander in Afghanistan, U.S. Army Gen. John Nicholson speaks during a change of command ceremony at the Resolute Support Headquarters in Kabul, Afghanistan. President Barack Obama's decision to allow more aggressive U.S. military action in support of Afghan combat operations against the Taliban could have a game-changing effect on the long war, Gen. John Nicholson, the top U.S. commander in Afghanistan, said Saturday, July 16, 2016. (AP Photo/Rahmat Gul, File)
FILE - In this Wednesday, March 2, 2016 file photo, new U.S. commander in Afghanistan, U.S. Army Gen. John Nicholson speaks during a change of command ceremony at the Resolute Support Headquarters in Kabul, Afghanistan. President Barack Obama's decision to allow more aggressive U.S. military action in support of Afghan combat operations against the Taliban could have a game-changing effect on the long war, Gen. John Nicholson, the top U.S. commander in Afghanistan, said Saturday, July 16, 2016. (AP Photo/Rahmat Gul, File) Credit: Rahmat Gul

After inflicting heavy losses on weakened Afghan security forces a year ago, the Taliban under new leadership have been surprisingly slow to ramp up attacks at the midpoint of the traditional fighting season, senior American military officers said Sunday.

In an Associated Press interview, Marine Gen. Joseph Dunford, chairman of the Joint Chiefs of Staff, said he is cautiously encouraged by a relative slackening of the Talibanโ€™s aggressive tactics.

Citing โ€œa lower level of violence from the Taliban than we have seen in the past,โ€ Dunford was quick to say that while he believes Afghan forces have seized battlefield momentum, there are no assurances that the balance wonโ€™t shift again.

โ€œWeโ€™ve seen peaks and valleys with the Taliban before, but certainly on the ground right now the Afghan forces have the momentum,โ€ he said, speaking aboard an Air Force C-17 transport plane en route from Bagram Air Base in Afghanistan to Stuttgart, Germany. Dunford spent three days in Afghanistan speaking with U.S. and Afghan commanders, troops and officials. On Sunday he met with President Ashraf Ghani and other senior members of Ghaniโ€™s government in Kabul.

Dunford commanded all U.S. and coalition forces in Afghanistan from February 2013 to August 2014.

In separate interviews in Afghanistan over the weekend, other senior U.S. officers highlighted an unexpected easing of Taliban military pressure in the days since Ramadan, the period of traditional Muslim fasting, ended in early July. One called it a โ€œtactical pause,โ€ another said it points to a weakening of the Taliban, but none claimed it means an early end to the long war.

Private analysts interviewed Sunday expressed skepticism about the warโ€™s progress.

Anthony Cordesman, an Afghanistan expert at the Center for Strategic and International Studies, said there are many forces at work against the country in addition to a resilient Taliban, even if the militants may have become more fragmented.

โ€œPoverty is rising, governance is extremely weak and virtually absent in many districts,โ€ Cordesman said in an email exchange.