Russia appears to have been deterred by NATO's firm response last month to incursions into Polish and Estonian airspace, but Moscow is expected to continue testing boundaries, the U.S. general serving as NATO's top commander said on Tuesday.

A group of military veterans and defense experts urged European leaders to boost support for green fuels ahead of their summit in Brussels.

Trump has pushed NATO members to spend at least 5 percent of their GDP on national defense. At a NATO summit in The Hague in June, most members agreed to a spending target of 5 percent of GDP — 3.5 percent on core military expenditure and 1.5 percent in defense-related areas such as military mobility by 2035.

Intelligence sharing is an intricate, delicate balance that hinges on trust—which was upturned for many of America's allies when President Donald Trump strode back into the White House at the start of the year.

NATO Secretary General Mark Rutte opened his remarks alongside President Donald Trump in the Oval Office Wednesday by applauding Trump's efforts at a ceasefire in the Middle East.

United States Secretary of Defense Pete Hegseth said “firepower” is coming to Ukraine through European nations’ purchases of US weapons, but whether that includes American-made Tomahawk missiles is still not clear.

The Polish foreign minister said he could not guarantee that Russian President Vladimir Putin's plane would not be forced to land.

Following Russia's violations of NATO airspace and renewed strikes in Ukraine, NATO members weigh air defense options ahead of the defense ministers meeting.