The NATO Chiefs of Defense reaffirmed support for Ukraine in a virtual meeting Wednesday in Brussels that included all 32 allied military leaders and featured the first briefing in this format led by U.S. Gen. Alexus Grynkewich, the new Supreme Allied Commander Europe (SACEUR).

U.S. Joint Chiefs of Staff Chairman Gen. Dan Caine attended the meeting virtually, along with Grynkewich, who also leads U.S. European Command, U.S. officials confirmed to Fox News on Tuesday.

NATO officials said in a statement that the “candid discussion” centered on what security guarantees the alliance might provide Ukraine as part of a potential peace agreement to end Russia’s three-year war.

Col. Martin O’Donnell, spokesperson for Supreme Headquarters Allied Powers Europe, wrote on X that “the Supreme Allied Commander was honored to brief the Chiefs of Defense, his first in such a format. As he has said before, ‘these are consequential times.'”

According to the Associated Press, assurances that Ukraine won’t face another invasion are seen as central to any settlement, with Kyiv pressing for Western-backed military commitments, including weapons and training. European allies are working on options for a multinational security force that could backstop a peace deal.

Wednesday’s virtual session unfolded against the backdrop of President Donald Trump’s push to steer Russian President Vladimir Putin and Ukrainian President Volodymyr Zelenskyy toward a settlement. Trump met with Putin last Friday in Alaska and hosted Zelenskyy and European leaders at the White House on Monday. 

The reaffirmations come a day after Caine convened a smaller meeting in Washington with defense chiefs from Germany, the U.K., France, Finland and Italy to prepare for Wednesday’s broader NATO discussions.

NATO military leaders reaffirm support for Ukraine in a virtual meeting with 32 allied chiefs on Wednesday. (NATO)

Russian Foreign Minister Sergey Lavrov criticized NATO discussions on Ukraine’s security conducted without Moscow’s involvement, warning that “this will not work” and vowing Russia would “ensure its legitimate interests firmly and harshly,” RIA Novosti reported, according to AP.

The White House did not immediately return Fox News Digital’s request for comment.

The Associated Press contributed to this report.