Baltic states join NATO (2004)
Estonia, Latvia, and Lithuania joined NATO in 2004, two years after the alliance's Prague summit invited them. The accession placed the three former Soviet republics under the collective defense umbrella, with U.S. and European troops rotating through their territory.
The Baltics gained formal security guarantees from the alliance, ending their post-Soviet security vacuum.
NATO membership became the framework for all subsequent Baltic defense decisions, including the enhanced forward presence established after 2014 and the air-policing mission flown during the 2026 election.
NATO's reinforcement of Latvian airspace during the October 2026 vote is a direct expression of the same commitment made in 2004 — the alliance's eastern flank is defended as its own territory.
