NATO Secretary General Mark Rutte on Thursday urged the United States to keep supplying Ukraine with weapons to fight Russia's invasion and said he was sure Europe was ready to pay the bill. Speaking at the World Economic Forum in Davos,

The West hasn't phased out all of its older airframes. In a high-end conflict, those older aircraft would likely need to employ tactics similar to those Ukraine's air force is employing now with its Soviet-era fighter jets and its US-made F-16s.

Russia on Thursday rejected the idea of NATO countries sending peacekeeping troops to Ukraine in the event of a ceasefire in the war with Russia, saying such a move would threaten to cause an "uncontrollable escalation".

NATO Secretary-General Mark Rutte has warned that a Russian victory over Ukraine would undermine the dissuasive force of the world’s biggest military alliance and could cost trillions of dollars to restore the organization's credibility.

NATO Secretary General Mark Rutte reaffirmed on Thursday the need to step up support for Ukraine, adding it was vital Russia did not win as it could result in Russian President Vladimir Putin 'high fiving' the leaders of North Korea and China.

Russia has had battlefield momentum but its recent territorial gains have been at the expense of high personnel losses.

BRUSSELS (Reuters) - European Union foreign policy chief Kaja Kallas pushed back on Wednesday against Donald Trump for saying that Europe lagged behind the U.S. in aid for Ukraine, and insisted the bloc must have a seat at the table when the time comes for peace talks.

Two generals and a colonel blamed for the loss of territory in eastern Ukraine to Russian forces last year have been held, the country’s security service said.

Speaking at Davos, Poland's foreign minister said Putin was repeating a Soviet-era mistake, which was ruining Russia's economy.

The NATO secretary general said the alliance needs to urgently step up development and production.

Oleksandr Syrskyi, Commander-in-Chief of the Armed Forces of Ukraine, has noted that the situation in the French-trained 155th Separate Mechanised Brigade named after Anna of Kyiv, which has faced issues with desertion,