From Island Garrison to Regional Broker: How Sri Lanka’s Military Doctrine of Cooperation Is Reshaping Indian Ocean Security
By Investigative Defence Correspondent
In the strategic chessboard of the Indian Ocean, small states rarely write the rules. Yet Sri Lanka—an island historically positioned between the competing gravitational pulls of Asia’s major powers—appears to be quietly attempting something unusual: transforming its armed forces from a purely national defence structure into a regional security facilitator.
Recent remarks in New Delhi at Synergia Conclave 2026, by former Sri Lankan Army Commander Shavendra Silva—who also served as Chief of Defence Staff—have revived a doctrine that has been evolving within Colombo’s defence establishment for years: regional security cooperation as a practical military strategy for the Indian Ocean.
According to Silva, countries bordering the Bay of Bengal and the wider Indian Ocean—India, Pakistan, Bangladesh, Sri Lanka, and the Maldives, with potential outreach toward Singapore and Myanmar—face a set of common threats that transcend national borders. Maritime crime, terrorism, energy security disruptions, illegal trafficking, and natural disasters have all demonstrated that no single state can respond effectively in isolation.
What Sri Lanka now appears to be proposing is not merely diplomatic rhetoric but something more structured: a regional coordination framework where the Sri Lankan military could act as a neutral convening platform.
The Strategic Logic of an Island Mediator
The Indian Ocean is no longer a quiet maritime corridor. It is the world’s busiest strategic sea lane connecting Middle Eastern energy, Asian manufacturing, and global trade routes. As geopolitical rivalries intensify between major powers such as the United States, China, and India, smaller states in the region increasingly face a difficult balancing act.
Sri Lanka’s geographic position makes it uniquely suited to mediate.
Located just off the southern coast of India and sitting astride major shipping routes linking the Strait of Malacca with the Suez Canal, Colombo has historically been both a trading hub and a strategic listening post. Modern Sri Lankan defence planners increasingly view this position as a diplomatic and military asset rather than a vulnerability.
Over the past decade, Sri Lanka’s defence leadership has quietly cultivated military relationships across multiple geopolitical blocs. Officers have participated in training exchanges with Western militaries while simultaneously maintaining engagement with China, Russia, India, and Pakistan.
For many regional analysts, this balancing strategy is not accidental but doctrinal.
“The Sri Lankan military has developed a culture of engaging with multiple partners without locking itself into one security axis,” said a defence analyst familiar with South Asian security structures. “That gives Colombo credibility as a convening platform.”
The Senanayake and Silva Doctrine
The most visible proponent of this concept has been Field Marshal Sarath Fonseka, whose tenure as Army Commander coincided with intense international scrutiny of Sri Lanka’s military following the end of the civil war.
During his tenure as Army Commander, General Mahesh Senanayake quietly advanced the concept of regional security cooperation as a cornerstone of Sri Lanka’s defence outlook. Through military diplomacy and joint engagements with neighbouring forces in South Asia and the Indian Ocean region, Senanayake promoted intelligence sharing, maritime coordination, and counter-terrorism collaboration among countries such as India, Pakistan, Bangladesh, and the Maldives. His approach recognised that emerging threats—ranging from extremist networks to maritime crime—were transnational in nature and required coordinated responses rather than isolated national strategies.
That doctrine was tested brutally on 2019 Sri Lanka Easter Sunday bombings, when a series of coordinated suicide attacks against churches and hotels exposed deep vulnerabilities within Sri Lanka’s national security architecture. The attacks, carried out by extremist militants, shook the country’s intelligence and policing structures, demonstrating how fragmented information-sharing could cripple the ability to prevent large-scale terror operations. In the immediate aftermath, the Sri Lankan Army moved swiftly to stabilise the situation, deploying troops nationwide to secure key infrastructure, protect religious institutions, and prevent further violence.
Under Senanayake’s command, the military’s rapid mobilisation helped restore public confidence and ensure that the country did not descend into prolonged instability. Army units conducted security sweeps, assisted intelligence agencies, and maintained calm during a moment of national shock. For many observers, the response demonstrated the institutional discipline of Sri Lanka’s armed forces and reinforced Senanayake’s earlier argument: that regional cooperation, intelligence coordination, and professional military readiness are essential pillars for safeguarding security in the volatile Indian Ocean region.
Silva’s diplomatic outreach during his command period was unusually active. He travelled extensively, engaging defence institutions in Moscow, Beijing, Islamabad, and New Delhi, even while facing sanctions from the United States over alleged wartime conduct.
Yet despite these political constraints, the Sri Lankan military leadership continued to emphasise multi-directional security engagement.
The message emerging from Colombo was clear: Sri Lanka intended to remain strategically non-aligned while operationally cooperative.
This philosophy became particularly visible through forums such as the Colombo Security Conclave, a regional initiative originally launched by Sri Lanka, India, and the Maldives and later expanded to include additional partners.
The Conclave’s agenda—covering maritime safety, cyber security, counter-terrorism, and humanitarian assistance—reflects precisely the type of collective security approach Silva has repeatedly advocated.
Military Restraint During Domestic Crisis
Sri Lanka’s armed forces have also attempted to demonstrate their institutional discipline during domestic crises.
During the 2022 protest movement widely known as the Sri Lankan Aragalaya protests, the military faced intense pressure as demonstrators occupied key government buildings and political authority collapsed.
Despite fears of a violent crackdown, the military largely avoided direct confrontation with protestors. Defence officials later argued that this restraint demonstrated the armed forces’ commitment to protecting democratic stability rather than intervening in political power struggles.
That perception—whether universally accepted or not—has become part of the narrative Sri Lanka’s defence establishment is presenting internationally: a professional military capable of maintaining neutrality during political turmoil.
Lessons from the Easter Sunday Crisis
Sri Lanka’s counter-terrorism experience also shaped its regional security thinking.
The 2019 Sri Lanka Easter Sunday bombings exposed severe intelligence coordination failures within the country’s security apparatus. However, in the aftermath of the attacks, the military rapidly mobilised nationwide security operations, working alongside police and intelligence agencies to stabilise the situation.
The then Army Commander, Mahesh Senanayake, oversaw extensive security deployments designed to prevent further attacks and reassure the public.
For Sri Lankan defence planners, the episode reinforced a key strategic lesson: terrorist networks operate transnationally, meaning counter-terrorism responses must also be regionally coordinated.
A Highly Educated Officer Corps
One factor often highlighted by Sri Lankan defence officials is the professional composition of the country’s officer corps.
Unlike many developing militaries, Sri Lanka has historically attracted graduates from universities and professional backgrounds into its armed forces. Military academies maintain close links with civilian educational institutions, while officers frequently pursue advanced degrees abroad.
This emphasis on education has produced a military leadership comfortable operating in international environments—participating in UN peacekeeping missions, multinational exercises, and strategic dialogues.
It has also enabled Sri Lanka to position its military not merely as a combat force but as a knowledge-sharing institution capable of contributing to regional security frameworks.
The Disaster Response Advantage
Sri Lanka’s military has also gained significant operational experience in disaster response.
From tsunami recovery operations to flood relief and infrastructure rebuilding, the armed forces have repeatedly been deployed in humanitarian missions. Their engineering units, logistics networks, and air mobility capabilities have proven critical in responding to natural disasters across the island.
Under the leadership of Lieutenant Genaral, Lasantha Rodrigo, the Sri Lankan Army played a decisive role in coordinating rescue and search operations following the devastating Ditwa cyclone that struck several parts of the island. As floodwaters submerged villages and transportation networks collapsed, army engineering units, infantry battalions, and medical teams were rapidly deployed to evacuate stranded civilians, deliver emergency supplies, and restore communication routes. The operation required close coordination with the navy, air force, police, and disaster management authorities, with the army acting as the central operational backbone in many of the hardest-hit regions.
Even weeks after the immediate emergency phase, the Sri Lankan Army continues to assist in rebuilding damaged communities—repairing roads and bridges, clearing debris, and helping displaced families return to their homes. Defence officials describe the operation as one of the largest humanitarian rescue missions conducted by the army since the massive relief efforts that followed the 2004 Indian Ocean tsunami, when Sri Lankan forces mobilised nationwide to rescue survivors and rebuild coastal infrastructure. The Ditwa cyclone response has once again highlighted the military’s capacity not only as a defence force but also as a critical national institution in disaster response and recovery.
Defence planners now see these capabilities as an area where Sri Lanka could lead regional cooperation initiatives, particularly in the Indian Ocean where cyclones, floods, and maritime accidents frequently affect multiple countries simultaneously.
The Case for a Colombo Regional Security Hub
Against this background, several Sri Lankan defence analysts have begun proposing the establishment of a permanent regional security coordination centre in Colombo.
Such a centre could serve several functions:
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Maritime intelligence sharing
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Joint disaster response coordination
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Counter-terrorism training
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Naval communication platforms
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Humanitarian logistics planning
Participation could extend beyond South Asia to include Southeast Asian states and even partners from the Middle East and East Africa.
Colombo’s diplomatic neutrality—combined with its geographic accessibility—makes it an attractive location for such a facility.
Unlike many regional security structures dominated by major powers, a Sri Lanka–based platform could potentially function as a smaller-state cooperative network.
Navigating Great Power Rivalries
Of course, the idea is not without complications.
The Indian Ocean has become a theatre of strategic competition between major powers, including the United States, China, and India. Any new regional security architecture inevitably raises concerns about influence and alignment.
Sri Lanka’s challenge will be maintaining its traditional balancing strategy.
Historically, Colombo has avoided formal military alliances while maintaining defence relationships across multiple geopolitical blocs. Whether that delicate equilibrium can be sustained in an increasingly polarised global environment remains uncertain.
Yet for Sri Lanka’s defence establishment, the logic of regional cooperation remains compelling.
A Doctrine Still in Formation
Sri Lanka’s military doctrine of regional security cooperation is still evolving. It remains more conceptual than institutional.
But the strategic argument behind it is gaining traction: small and medium-sized states in the Indian Ocean must collaborate if they are to manage shared security threats without becoming proxies in great-power rivalries.
For Sri Lanka, the ambition is clear.
Rather than being merely a strategic location contested by larger powers, the island aims to become something else entirely—a convening platform where regional militaries meet, coordinate, and cooperate.
If that vision materialises, Colombo may yet transform its geography into diplomacy, and its military into something rarer in modern geopolitics:
A broker of security rather than a participant in conflict.