Timeline of Sweden's Bid to Join the NATO Alliance

Sweden's bid to join NATO was accepted by the Hungarian parliament, making Sweden the organization's 32nd member. Hungary was the final holdout following Turkey's acceptance of Sweden's accession in January.

Stockholm:Hungary's parliament approved Sweden's application to join NATO on Monday, paving the way for the Scandinavian country to become the alliance's 32nd member. Hungary was the last holdout after Turkey agreed to Sweden's accession in January. Newcomers need to be approved by all existing NATO members.

Once neutral Sweden and neighbouring Finland decided to seek NATO membership after Russia's invasion of Ukraine in February 2022. While Finland joined in April of last year, Sweden was kept waiting as both Turkey and Hungary held up the process. Here are some of the key events on Sweden's path to becoming a member of NATO.

February 24, 2022: Russia invades Ukraine after a monthslong buildup of troops. In both Sweden and Finland, support for NATO membership grows, but Swedish Prime Minister Magdalena Andersson rules out joining the alliance, saying it would raise tensions in the region.

May 15, 2022: Andersson's Social Democrats reverse course, saying Sweden would be better off joining NATO together with Finland.

May 18, 2022: The Swedish and Finnish governments hand their official letters of application to NATO Secretary-General Jens Stoltenberg. The move has the backing of a clear majority of lawmakers in the Swedish Parliament.

June 28, 2022: Sweden, Finland and Turkiye sign a deal at a NATO summit in which the two Nordic countries agree to support Turkiye against Kurdish militants in Turkiye and Syria. Turkish President Recep Tayyip Erdogan earlier accused Finland and Sweden of being too soft on militant groups that Turkiye sees as threats to its national security.

July 5, 2022: Canada, Iceland, Norway and Denmark are the first NATO members to approve the two newcomers. By the end of September, all members have ratified Sweden and Finland's accession, except Turkey and Hungary.

October 18, 2022: A centre-right coalition government takes office in Sweden after winning a parliamentary election. The new prime minister, Ulf Kristersson, vows to continue pressing for NATO membership.

March 22, 2023: Swedish lawmakers formally approve joining NATO. The decision authorises the government to join the organization once all NATO members have ratified Sweden's entry.

April 4, 2023: Finland becomes NATO's 31st member after receiving the green light from Turkiye and Hungary. However, both countries delay their decisions on Sweden.

June 1, 2023: A new anti-terrorism law takes effect that is at least partially aimed at addressing Turkish concerns that Sweden needs to take concrete steps to crack down on militant groups that have carried out attacks in Turkiye.

July 10, 2023: At a NATO summit in Lithuania, leaders say that Erdogan has promised to send Sweden's accession documents to the Turkish parliament for approval.

September 11, 2023: Kristersson's government says it wants to increase its defence budget by 28 per cent, putting it on track to reach the military spending target of 2 per cent of gross domestic product set by the NATO alliance.

October 23, 2023: Erdogan submits Sweden's application to the Turkish parliament for ratification.

December 26, 2023: A Turkish parliamentary committee approves Sweden's NATO membership bid.

January 23, 2024: Turkiye's parliament endorses Sweden's NATO application.

February 18, 2024: A bipartisan delegation of US senators makes an official visit to Hungary's capital, calling on the government to immediately approve Sweden's NATO request.

February 26, 2024: Hungary's parliament votes to ratify Sweden's bid to join NATO.