Ukraine is increasingly becoming a de facto member of NATO, although official accession is still a long way off. Read about Ukraine's cooperation with NATO against the backdrop of the Russian threat and the Alliance's contradictions with the US in an interview with Alyona Getmanchuk,

Nato members agree to support each other if they come under attack. But how does Trump's threats on Greenland impact the future of the treaty?

President Trump’s threats have drawn bipartisan concern in Washington.

WASHINGTON — Democratic senators warned Sunday that a US invasion of Greenland would mean the “end of NATO” — and that America would be at war with Europe. Sen. Chris Murphy (D-Conn.) said Sunday that NATO would be forced to step in if the US annexed the Danish territory,

Add Yahoo as a preferred source to see more of our stories on Google. A senior Ukrainian officer said NATO would suffer heavy losses in a war against Russia.Owen Humphreys/PA Images via Getty Images A Ukrainian officer warned that NATO would face heavier ...

Russia's "massive" military losses in Ukraine are unsustainable, NATO Secretary General warns, as conflict set to enter fourth year with no clear end in sight.

"The Russian people are increasingly feeling the effects of the Kremlin's continued prioritization of the Russian defense industrial base."

Global financial markets plunged as U.S. President Donald Trump threatened steep tariffs on key European and NATO allies in a bid to force a controversial push for control over Greenland. The tariff threats — and an unprecedented 200% tariff warning against France over diplomatic tensions — rattled investors,