The United States and Russia agreed on Thursday to reestablish high-level military-to-military dialogue for the first time in over four years, a new sign of warming ties since President Donald Trump returned to office as Washington pushes to end the war in Ukraine.

High-level military communication was suspended in late 2021, as tension between Moscow and Washington rose ahead of the full-scale Russian invasion of Ukraine in February 2022. Trump then campaigned for a second term on promises that he would swiftly end the fighting. Many of his proposals for peace have heavily favored the Kremlin, including requiring Ukraine to cede territory to Russia.

The restored communication channel "will provide a consistent military-to-military contact as the parties continue to work towards a lasting peace," the U.S. European Command said in a statement. The agreement emerged from a meeting between senior Russian and American military officials in the capital of the United Arab Emirates.

U.S. Gen. Alexus Grynkewich, who is the commander in Europe of both U.S. and NATO forces, was in Abu Dhabi, where talks between American, Russian and Ukrainian officials on ending the war entered a second day.

Meanwhile, Moscow escalated its attacks on Ukraine's power grid in an apparent effort to deny civilians power and to weaken public support for the fight, while hostilities continued along the roughly 1,000-kilometer (600-mile) front line snaking through eastern and southern parts of Ukraine.