As noted, in order to increase the presence of the NATO contingent, the situation around Ukraine should worsen, and a corresponding request from the allies should also follow.
"Until these circumstances happened," RIA Novosti quoted Kirby as saying.
He also added that he could not clarify whether the United States would send its citizens to increase the NATO contingent in Europe due to the lack of specified conditions.
In December 2021, White House spokeswoman Jen Psaki said that the United States is studying the possibility of sending troops to Eastern Europe if the situation aggravates over Ukraine.
According to her, "this opportunity is on the table if Russia decides to invade Ukraine."