Sweden has officially become NATO's 32nd member as the US receives accession instruments.
It comes almost two years after Sweden applied to join the military alliance following the start of the Russian war on Ukraine in February 2022.
"Good things come to those who wait," US Secretary of State Antony Blinken said at the State Department after receiving accession instruments on Thursday.
He was joined by Swedish Prime Minister Ulf Kristersson and Swedish Foreign Minister Tobias Billstrom.
'Historic moment'
"This is a historic moment for Sweden. This is historic for our alliance. It's historic for the transatlantic relationship," Blinken said. "Our NATO alliance, or defensive alliance is now stronger and larger than it's ever been."
He said that "there's also no clearer example than today of the strategic debacle" of Russia's war on Ukraine.
Kristersson said Sweden is leaving 200 years of neutrality and military non-alignment behind and called his country's ascension a "major step but at the same time a very natural step."
"The security situation in our region has not been this serious since the Second World War," he said. "Russia will stay a serious threat to the Euro Atlantic security for the foreseeable future."
Hoisting of Swedish flag
"It was in this light Sweden, applied to join NATO," he added.
Sweden and Finland applied for NATO membership in May 2022, abandoning their longstanding non-alignment policies, a decision spurred by Russia's war against Ukraine.
Finland, which shares a 1,340-kilometre (832-mile) border with Russia, became a member of NATO on April 4, 2023, bringing the number of member states to 31.
Sweden completed its membership procedures after all NATO members agreed on its membership to the alliance, and instruments of ratification were sent on Thursday to Washington.
Sweden's flag will be raised alongside the other 31 members in a ceremony on Monday at NATO headquarters in Brussels to mark the accession.
➤Click here to follow our WhatsApp channel for more stories.
