Turkey's parliament has finally voted to approve Finland's bid to join NATO, leaving Hungary as the only country yet to approve of the Nordic country's accession to the Western military alliance. After Russia's invasion of Ukraine, both Finland and Sweden abandoned their policy of non-alignment, with both applying to join the alliance last year. The unanimous backing of the NATO member countries is required to admit new members into the alliance. The potential membership of Finland, however, represents a double-sided sword. The membership of Finland would remould European security, doubling the NATO land border with Russia in a largely ignored and therefore potentially vulnerable area for hundreds of years. The Russian annexation of Crimea first changed this perspective, and NATO's response ever since now means that the Finnish-Russian border could become a focus of heightened tensions or worse. The conflict between Swedish rebel group Kurdistan Workers' Party (PKK) and Turkey remains a significant barrier to Swedish membership; Turkey remains a significant decider of who may and may not join NATO. Though most officials believe Turkey will eventually back Sweden, nothing is yet confirmed, taking up time and energy, while Russia continues its war against Ukraine.