Rank #79 · Asia-Pacific
Mongolia maintains one of the world's smallest defence budgets in absolute terms — approximately $130 million — fielding a 35,000-strong force sandwiched between Russia and China. Ulaanbaatar's "third neighbour" policy actively cultivates security ties with the United States, Japan, and European powers to offset geopolitical dependence on its two giant neighbours, and Mongolia has emerged as a disproportionately large per-capita contributor to UN peacekeeping missions.
Mongolia's defence budget is extremely modest, reflecting both limited fiscal capacity (GDP ~$20 billion) and a strategic environment that relies on diplomatic balancing rather than military deterrence. The MoD budget covers personnel for 35,000 active troops, maintenance of Soviet-era equipment, and growing contributions to UN peacekeeping. Russia donated two MiG-29 fighters in 2019 — Mongolia's only combat-capable fast-jets — reflecting the limits of domestic procurement. NATO cooperation (including cyber-security capacity building) provides training and some equipment at no cost. The budget has minimal capital procurement beyond maintenance and small arms replacement.
The Mongolian Armed Forces consist of the Ground Force, Air Force, Construction and Engineering Forces, Cyber Security Forces, and Special Forces. The Ground Force is the dominant element, equipped with T-54/55 and T-62 tanks, BMP IFVs, and Soviet-era artillery — mostly 1950s-1970s vintage. The Air Force operates two Russian-donated MiG-29 fighters and a small transport/helicopter fleet. The 230,000-strong reserve force is large relative to the 35,000 active component, reflecting a compulsory service model with an extended reserve obligation. Mongolia declared itself a nuclear-weapons-free zone in 1992, codified internationally in 2012, creating an unusual security guarantee vis-à-vis its nuclear-armed neighbours.
Mongolia has no meaningful domestic defence manufacturing capability. All major platforms — tanks, infantry fighting vehicles, artillery, aircraft — are Soviet-era legacy systems requiring Russian spare parts. Russia remains the primary equipment source by default. China has provided some light vehicles and equipment. The US and NATO partners have supplied personal protective equipment, communications gear, and training through peacekeeping capacity-building programmes. Mongolia's extreme geographic isolation — landlocked between Russia and China with no ocean access — creates severe supply-chain dependencies for any future military procurement diversification effort.
Mongolia has no active external conflicts and faces no credible near-term military threat. Its vulnerability is structural: 100% landlocked between Russia and China, with minimal autonomous defence capacity against either neighbour. The "third neighbour" policy — formal strategic partnerships with the US (2019 Strategic Partnership), Japan, and the EU — aims to provide political insurance without provoking Moscow or Beijing. Mongolia's nuclear-weapons-free zone status creates a distinctive diplomatic asset: it has received security assurances from all five NPT nuclear-weapon states. Peacekeeping serves as Mongolia's primary military diplomacy tool, building relationships and interoperability with Western militaries.
Mongolia has deployed over 800 peacekeeping troops as of 2025, ranking it among the top 30 UN contributors globally despite its tiny population — one of the highest per-capita contributions in the world. A US-Mongolia Strategic Partnership agreement signed in 2019 has generated annual joint military exercises (Khaan Quest) and equipment donations. NATO provided cyber-security assistance through a partnership programme completed in 2021. Mongolia navigated intense pressure from both Russia and China to condemn or endorse various Security Council positions on Ukraine; it abstained on key UN votes. In 2024-2025 Mongolia hosted high-level US and European security dialogues as part of its third-neighbour engagement strategy.
Approximately $130 million annually (~0.8% of GDP), one of the smallest defence budgets by absolute value among countries with a standing military. The figure reflects Mongolia's limited fiscal capacity and reliance on diplomatic balancing rather than military deterrence.
A foreign policy doctrine — pursued since the 1990s — of cultivating strong relationships with democratic powers (the US, Japan, South Korea, EU) to create strategic counterweights to Mongolia's dependence on Russia and China. Military components include the Khaan Quest joint exercises with the US and NATO cyber-security partnerships.
Peacekeeping serves multiple purposes: it generates hard-currency UN reimbursements that supplement the defence budget; it builds operational experience and interoperability with Western militaries; and it gives Mongolia a credible role in international security institutions that enhances its diplomatic standing with the "third neighbour" partners it courts.
Yes. Mongolia declared itself a single-state nuclear-weapons-free zone in 1992. The status was formally recognised by all five NPT nuclear-weapon states in 2012, committing them not to use or threaten nuclear weapons against Mongolia — an unusual diplomatic insurance policy for a landlocked state between two nuclear powers.