World's Most Vulnerable Nations: 10 Countries Risking Catastrophe in War

Throughout human history, warfare has shaped the destiny of nations. From ancient civilizations wielding clubs and spears to modern states stockpiling advanced weaponry, military strength has remained a cornerstone of global power. Today, nations with substantial armed forces and cutting-edge military technology command greater influence on the world stage. However, not every country has followed this path.

Some nations have deliberately chosen to maintain minimal military forces or none at all, relying instead on diplomatic relations and defense treaties for their protection.

While this approach has allowed these countries to invest heavily in social programs and maintain peaceful international relations, it also leaves them profoundly vulnerable. In an era where geopolitical tensions continue to simmer, these nations face a critical question: what would happen if war broke out?

Bhutan: The Himalayan Kingdom with a 1% Military Force

Nestled between two of the world’s most powerful nations, Bhutan represents one of the most militarily vulnerable countries on Earth. This small Himalayan kingdom, with a population of approximately 800,000 people, maintains a Royal Bhutan Army of only 8,000 to 9,000 officers—merely one percent of the country’s population, a stark contrast to its neighbors India and China, whose armies number in the millions.

Bhutan operates with a slim defense budget, no navy, and only a few active military aircraft. These constraints reflect the nation’s guiding philosophy of Gross National Happiness, which prioritizes citizen well-being over military expansion. When diplomatic tensions have arisen with China, Bhutan has consistently chosen protests, negotiations, and its alliance with India over military confrontation. India currently shoulders responsibility for Bhutan’s air defense and provides military training, arms supplies, and strategic intelligence.

If conflict erupted between India and China, Bhutan would face severe economic and military consequences, with its sovereignty potentially threatened even without direct involvement. The country’s primary defensive advantage lies not in military capability but in the rugged terrain of the Himalayas. Against either neighboring power, Bhutan’s army would likely be overwhelmed in a matter of weeks, if not days.

Iceland: NATO’s Only Member Without a Standing Army

Iceland holds a unique distinction as the only NATO member without its own military force. Since breaking away from Denmark in 1944, the country has never established a standing army, instead prioritizing defense alliances over conventional military development. This became formalized when Iceland joined NATO as a founding member in 1949, followed by a defense pact with the United States in 1951.

The Icelandic Coast Guard performs search and rescue operations, enforces maritime laws, manages Iceland’s air defense system, and operates air surveillance radars. The Viking Squad, a tactical police unit, handles counterterrorism and armed standoffs. Neither receives training for conventional warfare.

Recent geopolitical developments have thrust Iceland back into the spotlight. With the ongoing war in Ukraine and increased Russian and Chinese interest in the Arctic, Iceland’s strategic importance has intensified. When US President Donald Trump threatened to use military force to annex Greenland, Iceland’s neighbor, the question of creating a military resurfaced. However, a Gallup poll conducted between March and April 2025 found that 72 percent of Icelandic nationals oppose military creation, with only 14 percent supporting it.

A referendum on the topic is scheduled for 2027.

Iceland’s small population of around 400,000 presents a significant obstacle. Creating a military would drain its thin workforce and strain national finances. If war erupted between NATO and rival powers, Iceland’s strategic location would make neutrality impossible, leaving the nation entirely dependent on allied protection.

Costa Rica: The Pioneer of Military Abolition

On December 1, 1948, Costa Rica made history as the first country to officially dissolve its army. This unprecedented decision followed a devastating 44-day civil war that claimed at least 2,000 lives. Citizens celebrate Army Abolition Day annually, taking pride in their country’s unique stance.

The benefits have been substantial: Costa Rica has channeled massive investments into healthcare, education, and social initiatives, remaining relatively peaceful while neighboring countries endured civil wars. Costa Rica’s constitution does allow for the creation of a temporary military force during national emergencies. As a signatory to the Inter-American Treaty of Reciprocal Assistance, the country can theoretically call on regional allies including the United States for support if invaded. However, experts consider this treaty an obsolete agreement from a bygone era.

Security forces would be no match for a modern army. While the country can create a military force if needed, the time required could prove fatal in a conflict where weeks or months determine victory or defeat. There’s no guarantee that allies would commit soldiers to battle, meaning Costa Rica could pay a devastating price for its lack of military preparedness.

Mauritius: Africa’s Peaceful Island Nation

After gaining independence from Britain in 1968, Mauritius chose an unconventional path. Rather than establishing an army, the island nation’s leaders assigned defense responsibilities to the coast guard and police force. Nearly six decades later, this arrangement remains unchanged.

Mauritius possesses no combat aircraft, missiles, tanks, or heavy artillery systems—only a few light helicopters and armored vehicles. Total active security personnel, including paramilitary forces, number approximately 10,000 for a population of around 1.3 million people. The Global Peace Index has ranked Mauritius the safest country in Africa for 18 consecutive years through 2025.

Despite this impressive peace record, Mauritius remains unprepared for warfare. The closest US military base sits on Diego Garcia Island in the Chagos Archipelago, approximately 1,312 miles away. Mauritius’ strategic location in the Indian Ocean presents additional concerns—if war broke out between leading world powers, various countries might seek to occupy the island to secure important sea routes.

Kosovo: The Nation Building an Army from Scratch

Kosovo’s story centers on the brutal ethnic war of the 1990s, when Yugoslav forces clashed with the Kosovo Liberation Army. After NATO intervention ended the conflict in 1999, Kosovo unilaterally declared independence from Serbia in 2008—a declaration Serbia continues to refuse to recognize.

For years, the Kosovo Security Force operated as a lightly armed group of approximately 2,500 personnel, lacking tanks and combat aircraft. In 2018, the government announced plans to transform it into a regular army within ten years, expanding to between 5,000 and 7,500 troops. Kosovo has received training and equipment from the US, UK, Turkey, and other NATO members. In 2025, Prime Minister Albin Kurti announced plans to establish an ammunition factory by the end of 2026.

Despite these developments, Kosovo’s military remains relatively weak and highly dependent on foreign allies. As Kosovo lacks official UN membership—with Russia, China, and Serbia refusing to recognize its sovereignty—mobilizing unified international military response could prove complicated.

Panama: Strategic Vulnerability Along a Global Crossroads

Panama officially disbanded its military following the US invasion in 1989 and General Manuel Noriega’s deposition, to prevent future coups and enable democratic governance. The Panama Public Forces replaced the army, comprising the national police, institutional protection service, national border service, and national air and naval service—approximately 26,000 personnel for a population of around 4.5 million.

These agencies possess no heavy artillery, combat aircraft, or advanced maritime and air defense systems. Panama relies heavily on the US for these capabilities. America’s strong interest in Panama stems largely from the Panama Canal—any upheaval affecting this global shipping route would trigger major worldwide economic effects.

If war breaks out, Panama’s survival hinges on securing US assistance. Adversaries need not conquer the entire country to achieve victory; simply attacking or seizing the canal would destabilize Panama and the entire region.

The Microstate Trio: Liechtenstein, Monaco, and Andorra

Liechtenstein’s Neutrality Strategy

Liechtenstein officially abolished its military in 1868 due to prohibitive maintenance costs. The country adopted neutrality, successfully avoiding involvement in both World Wars, while maintaining an informal agreement with Switzerland for national defense. The police force numbers just 100 to 120 officers. All male citizens are obligated to serve in a volunteer national guard and defend the country when necessary.

Although Liechtenstein’s constitution permits army mobilization during wartime, no such need has arisen in over 150 years. If war erupted, the country would depend entirely on Switzerland, lacking artillery, air defenses, or soldiers. Switzerland isn’t legally required to respond under their informal agreement, but the likelihood of Swiss involvement remains high.

Monaco’s Ceremonial Forces

Monaco maintains one of the smallest and weakest military forces—approximately 255 officers across two security units. The Compagnie des Carabiniers du Prince protects the royal family and judiciary, while the Corps des Sapeurs-Pompiers handles firefighting and civil defense. Despite high training standards, the Prince’s Carabiniers Company serves largely ceremonial functions. Tourists gather at the palace before noon daily to photograph the changing of the guard.

Monaco depends on France for protection against external threats. France borders Monaco on three sides and the countries first signed a defense pact in 1918. If France engaged in major war or fell to invading forces, Monaco would be left completely unprotected. Covering less than one square mile with fewer than 40,000 residents, Monaco’s fate rests entirely in French hands.

Andorra’s Medieval Volunteer Force

Andorra maintains no standing army—Spain and France share responsibility for defending this tiny nation. Andorra operates a small volunteer force called the Sometent, whose origins trace back to medieval times when all male citizens aged 16 to 60 were required to join. However, the Sometent hasn’t been mobilized in more than 700 years. According to a former prime minister, it isn’t even included in the national budget and relies on donations for funding.

A recent poll found nearly 60 percent of Andorran citizens would be willing to fight for their country. However, modern warfare has evolved dramatically, and the Sometent would struggle against well-trained contemporary military forces. Andorra belongs to neither NATO nor the European Union, leaving it helpless if neither Spain nor France could provide rescue.

Antigua and Barbuda: Caribbean Vulnerability

Antigua and Barbuda maintains one of the world’s smallest militaries—just 245 officers with approximately 75 reserves for a population of around 91,000. The military lacks armored fighting vehicles, heavy artillery, or air defense systems, possessing only small arms and light weaponry. Their focus is stopping drug smuggling and maritime crimes rather than combat operations.

Through membership in the Regional Security System, neighboring Eastern Caribbean states are obligated to provide military personnel and intelligence if Antigua and Barbuda faces attack. However, neither the US nor UK maintains military bases in Antigua and Barbuda. Prime Minister Gaston Browne has repeatedly stated the country has “absolutely no interest” in hosting foreign military installations.

Like Mauritius, Antigua and Barbuda sits near key Atlantic Ocean shipping routes. If global powers engaged in war, countries like China and Russia might consider seizing it as a strategic asset. Even without direct conflict, major war would cripple the economy, which heavily depends on imports and tourism.

Frequently Asked Questions

Why would a country choose not to have a military?

The reasons vary. Costa Rica and Panama abolished armies after military coups to prevent future authoritarian takeovers. Liechtenstein disbanded its army in 1868 because maintenance was too expensive. Monaco and Andorra are so small that creating a credible force is impractical. Iceland chose to invest in social programs rather than defense, relying on NATO membership.

Does being in NATO protect a country without its own army?

NATO membership provides significant protection through Article 5—the collective defense clause—but it isn’t absolute. NATO members are expected to contribute to their own defense. Iceland’s 72% opposition to building a military demonstrates how some populations view alliance membership as a substitute for domestic forces.

Could these countries rebuild armies quickly if threatened?

Potentially, but time is the critical variable. Costa Rica’s constitution allows temporary military creation. However, training personnel, acquiring equipment, and establishing command structures takes months to years—far longer than modern conflicts typically allow.

Sources

• Jolomi Peppeh reporting for SideProjects, January 2026.
• Global Peace Index 2025, Institute for Economics and Peace.
• Gallup Iceland defense poll, March–April 2025.
• Inter-American Treaty of Reciprocal Assistance (Rio Treaty) documentation.