WarBrief Live | November 2, 2026 | Country Profile
Thailand fields one of Southeast Asia’s largest armed forces, built for territorial defence, border security and maritime patrol rather than power projection far from home. Its immediate test is on its western border, where Myanmar fighting spilled into Thailand on October 31, 2026.
Key Takeaways
- Thailand’s defence budget for fiscal 2026 is 204.24 billion baht, about 1.05% of GDP on Budget Bureau estimates.
- The Royal Thai Armed Forces number more than 360,000 active personnel, with the army by far the largest service.
- Four Gripen E/F fighters ordered in August 2025 are due from 2029, as the air force replaces ageing F-16s.
- On October 31, 2026, Myanmar airstrikes across the Salween River damaged about 17 buildings in Mae Sam Laep, Thailand, with no injuries reported.
Overview: a large, defensive, border-focused force
Thailand sits at the centre of mainland Southeast Asia, sharing land borders with Myanmar, Laos, Cambodia and Malaysia, and coastlines on both the Gulf of Thailand and the Andaman Sea. That geography explains the shape of its military: a large army oriented to borders and internal security, an air force built around air defence, and a navy split between two coasts and focused on patrol, amphibious lift and sea-lane protection.
Thailand has no nuclear weapons and no ballistic-missile force, and its ability to sustain operations far beyond Southeast Asia is limited. Its strengths are scale, familiarity with its own terrain, and an alliance and exercise network that keeps it interoperable with the United States and regional partners. Its constraints, widely noted in defence assessments, are ageing platforms, uneven modernisation and a high share of spending absorbed by personnel costs: data from 2023 cited in Thai parliamentary debate put total personnel at nearly 400,000 including conscripts, with more than half of annual defence spending going on salaries and welfare.
What are Thailand’s military capabilities?
The Royal Thai Armed Forces comprise the Royal Thai Army, the Royal Thai Navy and the Royal Thai Air Force, under the Ministry of Defence. Reporting based on Reuters figures puts total active personnel at more than 360,000. The army accounts for about 245,000 of that total, including an estimated 115,000 conscripts, and fields around 400 battle tanks, more than 1,200 armoured personnel carriers and some 2,600 artillery weapons. The air force has an estimated 46,000 personnel and 112 combat-capable aircraft, including 28 F-16s and 11 Swedish Gripen fighters. The navy has nearly 70,000 personnel, including a marine corps of about 23,000, seven frigates and 68 patrol and coastal combat vessels, plus the helicopter carrier HTMS Chakri Naruebet, which now operates rotary-wing aircraft only.
| Metric | Figure | Source |
|---|---|---|
| Defence budget, fiscal 2026 | 204.24 billion baht | Thailand Budget Bureau, via budget data |
| Defence spending, share of GDP | About 1.05% (fiscal 2026) | Budget Bureau estimates |
| Active personnel | More than 360,000 | Reuters comparison, December 2025 |
| Combat-capable aircraft | 112, including 28 F-16s and 11 Gripens | Reuters comparison, December 2025 |
Figures from different databases vary slightly by year and counting method, so the table uses the Reuters-based comparison for personnel and fleet totals to keep the numbers mutually consistent.
Military capabilities: army, air force and navy
The army is the dominant service and the one most directly engaged on the Myanmar border, through border regiments and ranger companies along remote frontiers. Conscripts remain a large share of army manpower, which keeps the force big but complicates the shift toward a smaller, more technically skilled military that Thai reformers have long debated.
The air force is Thailand’s most visibly modernising service. In August 2025, Saab confirmed an order for four Gripen E/F fighters — three single-seat Gripen E and one two-seat Gripen F — valued at about SEK 5.3 billion, with deliveries scheduled between 2025 and 2030 and the first aircraft expected in Thailand in 2029. The wider programme aims at 12 Gripen E/F aircraft in three phases to replace F-16s that have served for more than 37 years. In October 2026, the air force chief confirmed that a further phase remained a priority for the fiscal 2027 and 2028 budgets, although its cost, aircraft number and timetable had not been disclosed. Thai Gripens were also reported to have flown in combat for the first time during the July 2025 Cambodia border conflict.
The navy has no submarines in service. Its long-delayed S26T submarine programme, ordered from China in 2017, stalled over the supply of German MTU diesel engines; a revised agreement approved by the Thai cabinet in August 2025 substituted Chinese CHD620 engines and extended the timeline by 1,217 days, pushing delivery of the first boat to late 2028, according to Naval Technology and Asian Military Review reporting. The navy meanwhile operates seven frigates, seven corvettes and a large patrol force, and its landing platform dock HTMS Chang, delivered in 2023, gives it amphibious and disaster-relief lift across both coasts.
Alliances and posture: the US alliance, ASEAN and China
Thailand is a treaty ally of the United States and is classified by Washington as a major non-NATO ally. The centrepiece of the relationship is Cobra Gold, the annual multinational exercise co-hosted by Thailand and the United States. The 44th iteration ran from February 25 to March 7, 2025, with about 30 nations participating directly or as observers and about 3,200 US personnel taking part, according to the US Embassy in Bangkok.
At the same time, Thailand maintains a deliberately balanced posture. It buys from the United States, Sweden and China, hosts US exercises, and keeps working defence ties with Beijing, including the submarine programme. Within ASEAN, Thailand presents itself as a mediator and stabiliser rather than a South China Sea claimant, even though its Gulf of Thailand and Andaman Sea interests give it a direct stake in regional sea lanes. Its posture toward Myanmar is shaped less by alliance politics than by border management: trade, displacement and armed-group supply routes all cross the same frontier, and Bangkok has historically preferred engagement and border control over confrontation with Naypyidaw.
For related profiles, see the Country Profiles hub, our Philippines military capabilities profile and our Qatar military capabilities profile, as well as our Myanmar conflict profile.
Current developments: the Myanmar spillover at Mae Sam Laep
On October 31, 2026, Myanmar military aircraft dropped two bombs on a Karen National Union (KNU) position at Saw Lae Tha, across the Salween River from Mae Sam Laep in Mae Hong Son province. Thai officials who inspected the village on November 1 reported damage to about 17 homes and public buildings on the Thai side, including the subdistrict health centre, a child development centre, a tourist service centre, a mosque, a Buddhist temple and a Christian church. Shops along the river closed and boat services were temporarily suspended. No injuries were reported on the Thai side, according to Thai media reports.
The KNU said the strikes were intended to cut supply routes and cross-border trade serving its Brigade 5, and said Myanmar had sent a protest letter on August 31, 2026, through the Myanmar-Thai Border Committee warning Thai officials, traders and businesses against supplying the KNU. The incident came a day after the Thai Army closed unofficial border crossings from Myawaddy into Mae Sot for a week for security reasons, according to DVB reporting. A single cross-border strike did not become a bilateral crisis, but it exposed how quickly Myanmar’s civil war can impose costs on Thai civilians, and why Bangkok’s border force — rangers, local administration and army border units — is the part of the military most likely to be tested first.
What to watch next on Thailand’s borders and buildup
Three things will show whether Thailand’s capabilities are keeping pace with its border risks. First, whether Bangkok formally protests or seeks deconfliction arrangements after the Mae Sam Laep damage, and whether further Myanmar strikes land near Thai villages. Second, whether the Gripen programme’s next phase is funded in the fiscal 2027 budget, as the air force chief signalled in October 2026, or slips again to fiscal 2028. Third, whether the S26T submarine stays on its revised late-2028 delivery track, which would give Thailand its first submarine capability since 1951.
Frequently asked questions
How large is Thailand’s military?
Thailand has more than 360,000 active personnel, according to a Reuters-based comparison published in December 2025, with the army accounting for about 245,000, including about 115,000 conscripts.
Is Thailand a US ally?
Yes. Thailand is a treaty ally of the United States and is classified as a major non-NATO ally. The two countries co-host the annual Cobra Gold exercise, which in 2025 involved about 30 nations and about 3,200 US personnel.
What fighter jets is Thailand buying?
Thailand ordered four Saab Gripen E/F fighters in August 2025, valued at about SEK 5.3 billion, with the first aircraft expected in 2029. The wider programme aims at 12 aircraft to replace ageing F-16s, subject to future budget approval.
Sources
- The Nation: Thai officials report damage to about 17 buildings after Myanmar’s Oct 31 strike
- Khaosod English: Myanmar airstrikes hit base opposite Mae Sam Laep, damaging Thai buildings
- DVB: Airstrikes hit KNU base in Karen State along Myanmar-Thai border to choke off trade
- Malay Mail / Reuters: Cambodia-Thailand military comparison: Budgets, personnel and firepower
- Airforce Technology: Thai Air Force to purchase four Saab Gripen E/F jets
- Naval Technology: RTN resumes submarine project with Chinese contractors
- Khaosod English: US, Thai Forces Lead 30-Nation Military Exercise Cobra Gold 2025
