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              Congressional                                                      ____
           ~   Research Service






NATO's 2023 Vilnius Summit



Updated July 20, 2023

Leaders from the North Atlantic Treaty Organization's (NATO's) 31 member states (see Figure 1) met in
Vilnius, Lithuania, on July 11-12, 2023. The allies addressed numerous issues of interest to Congress,
including efforts to deter and respond to a possible Russian attack, NATO's relations with Ukraine, allied
defense spending, security threats posed by China, and Sweden's pending accession to the alliance.

Enhanced Deterrence and Defense

Since Russia's 2014 and 2022 invasions of Ukraine, NATO has bolstered its force posture in the eastern
part of the alliance, including by deploying eight multinational battlegroups in the region. Since early
2022, the number of allied soldiers deployed to Central and Eastern Europe more than tripled, bringing
approximately 40,000 allied troops in the region under direct NATO command. The United States has
been a leading proponent of these efforts and has deployed about 20,000 additional military personnel in
Europe since February 2022, including some under NATO command; as of mid-2022, U.S. forces in
Europe totaled approximately 100,000 personnel.
In Vilnius, the allies adopted new regional defense plans and force structure requirements, which NATO
leaders characterize as the most comprehensive since the end of the Cold War. NATO officials stress that
implementation will require increased defense investments from NATO members.

NATO-Ukraine Relations

In Vilnius, NATO leaders declared that Ukraine's future is in NATO; called on allies to continue
providing Ukraine with robust security assistance; and announced enhanced partnership programs with
Ukraine, including the creation of a new NATO-Ukraine Council. Underscoring its role as a defensive
alliance, NATO has declared it will not deploy forces to Ukraine. Allied governments have collectively
provided an estimated $79 billion in security assistance to Ukraine (including about $47 billion from the
United States), and NATO has provided about $82 million in nonlethal support, including medical
supplies and fuel.
Since 2008, NATO has reiterated a broad pledge that Ukraine will one day become a member but has not
outlined a timetable or specific benchmarks for a formal invitation. The Biden Administration and some
other allied governments have said Ukraine will not join NATO while the war is ongoing. Other allies,
including Poland and the Baltic states, have called for a more defined pathway to membership and have

                                                                Congressional Research Service
                                                                  https://crsreports.congress.gov
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