Rank #65 · Europe
Slovenia is a small NATO member that has historically underspent on defense at around 1-1.5% of GDP — lagging the alliance's 2% benchmark. Russia's invasion of Ukraine galvanized a significant spending acceleration, and Ljubljana committed to reaching NATO's 2% target by 2030. A major capability leap is underway: F-16 fighters to replace aging MiG-21s and Patria AMV XP wheeled infantry fighting vehicles are the cornerstones of the modernization program.
Slovenia's 2025 defense budget is approximately €980 million (~$1.05 billion), a roughly 18% nominal increase reflecting post-Ukraine acceleration. The government has formally committed to reaching 2% of GDP by 2030, requiring continued annual increases. The budget is split between personnel (dominant), operations, and investment — with the F-16 Block 70/72 procurement and Patria 8x8 buy representing the largest investment items. Slovenia received substantial NATO investment through the alliance's Security Investment Programme (NSIP) for infrastructure at Brnik and Cerklje air bases to accommodate F-16 operations. EU PESCO participation enables joint procurement efficiencies. Fiscal pressure from health and pension spending constrains the pace of increase.
The Slovenian Armed Forces (SV) are a small all-volunteer force of approximately 7,150 active personnel organized into a single Army with air and support elements. The infantry is structured around the 10th and 20th Motorized Battalions and a special forces unit. Slovenia has no independent air force; the Air Wing of the Army operates PC-9 trainers and UH-60M Black Hawks. The MiG-21 fleet was retired in 2004 after NATO accession, leaving Slovenia without a fighter aircraft for 20+ years — a gap addressed by the F-16 procurement. Naval assets are limited to a coastal surveillance and diving unit on the Adriatic at Koper. Slovenia contributes regularly to NATO enhanced Forward Presence (eFP) in Lithuania and Latvia.
Slovenia has a very limited defense industrial base. The country primarily relies on imports for all major weapons systems. The Patria AMV XP contract (signed with Finland's Patria in 2021 for 45 vehicles) has some Slovenian industrial offset requirements but limited local production. The F-16 acquisition — signed with the US via FMS — involves no domestic production. FOTONA, a Slovenian company, produces laser rangefinders and military-grade optical systems with some export success, representing the strongest indigenous defense niche. Slovenia participates in EU defence industrial cooperation through EDIRPA and EDF programs, seeking to leverage larger-partner supply chains.
Slovenia faces no direct military threat but sits at a historically sensitive Central European crossroads. As a NATO member bordering non-aligned Austria, Italy, Croatia, and Hungary, it contributes to alliance collective defense. The primary exposure is through eFP missions in the Baltic states, where Slovenia deploys battalion-size rotations. Slovenia has provided military assistance to Ukraine — including 28 M-55S tanks (updated T-55 variants), howitzers, and ammunition — representing a significant portion of its stockpile. Domestically, Slovenia's short coastline on the Adriatic and its position on Balkan migration routes present border management challenges below the threshold of military response.
Slovenia signed a government-to-government agreement with the United States in December 2023 for 16 F-16 Block 70/72 Viper aircraft, valued at approximately €400 million — the largest procurement in Slovenian history. Deliveries are expected from 2027. In parallel, Patria AMV XP deliveries began in 2024, with full fleet completion expected in 2026. Slovenia donated its M-55S tank fleet to Ukraine in 2022-23 and has procured replacement capacity through NATO allies. In April 2025 the Slovenian parliament approved the 2025-2034 Long-Term Defense Programme, committing to 2% GDP spending by 2030 and a 50% increase in active personnel by 2035.
No. Slovenia spent approximately 1.55% of GDP on defense in 2025, below the NATO 2% benchmark. The government has committed to reaching 2% by 2030, with the 2025-2034 Long-Term Defence Programme setting out the path. Slovenia has faced repeated criticism from alliance partners for underfunding.
Yes. In December 2023 Slovenia signed a $400 million government-to-government agreement with the US for 16 F-16 Block 70/72 aircraft, filling a fighter gap that has existed since the MiG-21 retirement in 2004. Deliveries are expected beginning in 2027, with pilots training in the US in the interim.
Slovenia donated its entire fleet of 28 M-55S upgraded T-55 tanks to Ukraine in 2022-23, along with howitzers and ammunition — a substantial share of its armored vehicle inventory. Slovenia has also provided humanitarian and non-lethal military assistance and supported training through NATO frameworks.