The top commander for US and NATO forces in Afghanistan said Wednesday that warring parties now have an “unprecedented” opportunity for peace, and insisted President Donald Trump's strategy for the beleaguered country is working.

“We have an unprecedented opportunity, or window of opportunity, for peace right now,” said General John Nicholson, the outgoing commander of NATO's Resolute Support mission.

He spoke to Pentagon reporters a year after Trump unveiled his strategy for Afghanistan, which includes renewed efforts to bring the Taliban to the negotiating table.