The U.S. mission to NATO shared images on social media of exercises showing it was ready "to deter aggression."
"Following Russia's invasion of Ukraine, NATO forces stand ready to secure allied airspace against all threats," NATO said in a video Thursday.
"The price we pay as the European Union, as NATO, is the price we can measure in currency, in money," NATO Secretary General Jens Stoltenberg said.
The Russian president's bluster was recently met with a major NATO announcement including the largest increased troop presence since the Cold War.
A Ukrainian official said he noticed how Finland and Sweden were able to bypass the normally lengthy process to get invited into NATO.
The NATO Response Force (NRF) is currently made up of around 40,000 troops, but it will swell to 300,000.
Mikhail Khodorkovsky, who served 10 years in jail after openly criticizing Russian President Vladimir Putin, called on NATO to do more for Ukraine.
Russian President Vladimir Putin's chief propagandist Vladimir Solovyov claimed we are "descending into bloody pages of world history."
"President Putin wanted less NATO and therefore he invaded Ukraine. But he is getting more NATO," NATO Secretary General Jens Stoltenberg said Thursday.
NATO Secretary General Jens Stoltenberg and U.S. Secretary of State Antony Blinken discussed the war in Ukraine during a joint news conference on Wednesday.
Mircea Geoană did not provide any details of a planned deployment, but said there would be "a robust, flexible and sustainable presence" in eastern Europe.
"As a member of NATO, Finland would strengthen the entire defense alliance," Finnish President Sauli Niinistö and Prime Minister Sanna Marin said in a joint statement.
In a statement to Newsweek, NATO Secretary General Jens Stoltenberg welcomed Finland's bid to join the alliance and promised a "smooth and swift" process.
Russia has repeatedly warned of military escalation and even the potential use of nuclear weapons if the two countries join the Trans-Atlantic alliance.
The claim that Finland will soon be joining the Transatlantic Alliance began spreading on social media on Saturday. But is it true?
The former president said that NATO members were not paying enough to defend themselves.
Finland's Prime Minister Sanna Marin said the Nordic country could decide to join NATO "within weeks."
The NATO chief said Beijing has "joined Moscow in questioning the right of nations to choose their own path."
On Tuesday, NATO Secretary-General Jens Stoltenberg said that Finland, along with its neighbor Sweden, would be "welcome" to join the alliance.
The secretary general of the alliance told a news conference: "it's for them to decide of course."
"Russia is not the neighbor we thought it was," said Finland Prime Minister Sanna Marin.
A new report shows that the overwhelming majority of NATO members are not meeting a key spending goal, which critics say leaves the U.S. unfairly burdened.
The retired commander of British land forces said Russia had called NATO's "bluff" and urged organizational reforms.
Secretary General Jens Stoltenberg noted the "unprecedented sanctions" allies have imposed on Russia to ensure Putin is paying a "high price."
"We are not going to move into Ukraine, neither on the ground, nor in the Ukrainian airspace," NATO Secretary-General Jens Stoltenberg said.
"We will do what it takes to protect and defend every ally and every inch of NATO territory," Secretary-General Jens Stoltenberg said.
Despite more than 100,000 Russian troops being stationed at the Western border with Ukraine, Moscow has consistently denied planning an invasion.
U.S. troops could soon be on their way to Eastern Europe, but not to defend Ukraine or engage the Russian military.
NATO Secretary-General Jens Stoltenberg told reporters on Friday that they will not abide by the Russian president's demands.