White House national security adviser

told reporters during Putin's speech that "this was a war of choice" for Russia and that Moscow could end the conflict if it wanted to.

"No one is attacking Russia.

There is some absurdity in the claims that Russia was under some form of military threat from Ukraine or anyone else," Sullivan said in Warsaw.

"Russia stops fighting in Ukraine and goes home, the war ends.

Ukraine stops fighting, and the US and the coalition stop helping them fight - then Ukraine disappears from the map," he added.

Putin's speech came hours before US President

, who arrived in Poland from Kiev on the evening of February 20, will deliver a major political speech in Warsaw and meet with Polish leaders and other allies to discuss Russia's war against Ukraine, the biggest conflict in Europe since World War II.

Sullivan said Biden would focus his speech on the broader lesson of Ukraine in what he sees as a "tipping point" in the global struggle between democracies and autocratic regimes.

On February 21, Putin announced, among other things, that Russia was suspending its participation in the Treaty on Strategic Offensive Weapons.

According to Putin, the Russian Federation is not withdrawing from the agreement, but it will not comply with it.

NATO Secretary General

"I regret today's decision of Russia to end its participation in the agreement.

Today's decision on the Treaty on Strategic Offensive Weapons has destroyed the entire architecture of arms control.

I strongly call on Russia to reconsider its decision and respect the existing agreements," said NATO Secretary General Jens Stoltenberg in Brussels at a joint press conference with the Minister of Foreign Affairs of Ukraine, Dmytro Kuleb, and the High Representative of the European Union for Foreign Policy and Security,

Borel