Essential Elements of Confidence Building in International Relations

When two heavily armed rivals stare each other down, the danger is rarely a planned war. More often it is the accident-a misread radar blip, a near-collision at sea, a military exercise mistaken for an invasion. Confidence building measures (CBMs) exist precisely to defuse these moments. They are deliberate steps that reduce the fear of surprise attack, make a rival’s behaviour more predictable, and keep communication open even when trust is absent. Born in the tense standoff of the Cold War, CBMs have become one of the most practical tools in the diplomat’s kit. This post breaks down what actually holds them together: the political commitments, the agreements, and the verification methods that turn good intentions into working arrangements.

What confidence building measures actually are 🔗

A confidence building measure is an action that signals goodwill and a willingness to share information with an adversary. The purpose is to reduce misunderstanding, tension, fear, and the risk of conflict escalation by emphasising trust and limiting the chances of an accidental clash. The logic is simple but powerful: states rarely have perfect knowledge of each other’s intentions or capabilities, and that uncertainty breeds suspicion. CBMs work by replacing some of that uncertainty with predictable rules and reliable channels.

The approach emerged from the efforts of the Cold War superpowers and their alliances–NATO and the Warsaw Pact-to avoid a conventional or nuclear war triggered by accident or miscalculation. The term itself was formally proposed by Belgium and Italy at the Helsinki talks and written into the 1975 Helsinki Final Act, which contained some of the first such measures and still forms the basis of current transparency arrangements among participating states. What began as a narrow arms-control idea has since spread far beyond Europe and now applies to all kinds of conflict situations.

The key elements of confidence building 🔗

While individual measures look very different, analysts at the Henry L. Stimson Center group them into four core categories. Communication, constraint, transparency, and verification are the primary CBM “tools,” and together they make state behaviour more predictable by opening channels and establishing patterns of conduct for military forces. Understanding these four elements is the easiest way to make sense of any CBM you encounter.

Communication 🔗

Communication measures prevent crises by keeping a line open even during the worst moments. The methods include hotlines–presidential or military–regional communication centres, and regular consultations. The most famous example is the hotline set up between Washington and Moscow after the Cuban Missile Crisis of 1962, when the absence of direct contact had nearly turned a standoff into catastrophe. A direct channel means that when something unexpected happens, leaders can ask “what is going on?” before reaching for a weapon.

Constraint 🔗

Constraint measures limit the levels and types of military power deployed in sensitive areas. In practice this has meant reducing deployments near borders and giving prior notification of military activities. By agreeing not to mass forces in certain zones or to warn the other side before exercises, rivals remove the most provocative triggers. A large troop movement near a border is far less alarming when it has been announced weeks in advance.

Transparency 🔗

Transparency measures generate openness about capabilities and activities. These typically involve pre-notification requirements, data exchanges, and voluntary observation of another state’s military exercises and operating procedures. Transparency does not require trust to begin with-it simply makes the rival’s posture visible. Once each side can see that the other is not preparing a surprise attack, the worst fears begin to fade.

Verification 🔗

Verification measures reduce mistrust by allowing each side to confirm that the other is keeping its word. In the military sphere this is done through aerial and ground-based sensors; in the diplomatic sphere through written agreements, independent observations, inspections, and treaties. Verification is what separates a hopeful promise from a durable arrangement. Crucially, the most successful Cold War CBMs used verification methods that were non-intrusive-a point worth exploring in detail.

Political commitments and the role of the status quo 🔗

Underneath every technical measure sits a political commitment. The most fundamental of these is a shared acceptance of the existing situation, or status quo. CBMs work best when both sides agree, at least implicitly, that they are not trying to overturn the current balance by force. This is why CBMs are often described as a form of preventive diplomacy-they manage a rivalry rather than resolve it.

Two political commitments recur across almost every CBM regime. The first is a commitment to non-escalation: an understanding that when an incident occurs, neither side will allow it to spiral into open conflict. The second is a commitment to continued dialogue, keeping channels open even when relations are frosty. These are modest pledges, but they are the soil in which more ambitious agreements can later grow. As the European experience showed, the first negotiated measures were preceded by years of small tests of trust, and progress came in increments rather than in one grand bargain.

Agreements with non-intrusive verification 🔗

One of the defining features of Cold War CBMs was their reliance on verification that did not require either side to open its territory to inspectors. This was politically essential-neither superpower would have accepted intrusive snooping. The breakthrough came with the use of “national technical means.”

The Strategic Arms Limitation Talks (SALT) 🔗

The SALT process, running from 1969 to the late 1970s, produced the first agreements limiting the superpowers’ most powerful weapons. The first round concluded on 26 May 1972, when Nixon and Brezhnev signed the ABM Treaty and the Interim Agreement on strategic offensive arms in Moscow. What made these agreements workable was their verification clause. Compliance was to be assured by “national technical means of verification,” with both sides undertaking not to interfere with each other’s monitoring and not to use deliberate concealment.

In plain terms, national technical means are monitoring techniques such as satellite photography used to verify adherence to a treaty. Each side could count the other’s missiles from space without ever setting foot on its soil. This non-intrusive design is precisely why the agreements were politically acceptable. Beyond the numbers they limited, the SALT negotiations also created something less tangible but equally valuable: a sustained channel for political and military dialogue that became the foundation for every later arms-control agreement between the two powers.

The 1972 Incidents at Sea Agreement 🔗

If SALT addressed the big strategic picture, the Incidents at Sea Agreement (INCSEA) tackled the daily friction that could spark an accidental war. By the late 1960s, the rapidly expanding American and Soviet navies were increasingly bumping into each other-sometimes literally-and the potential for inadvertent escalation into accidental war was obvious. Ships played dangerous games of chicken, and aircraft made threatening passes.

The United States proposed talks in 1968, the Soviet Union accepted in 1970, and the agreement was signed by Secretary of the Navy John Warner and Soviet Admiral Sergei Gorshkov during the 1972 Moscow summit. The agreement was strikingly practical. It set out steps to avoid collisions, required surveillance ships to keep a safe distance, mandated the use of accepted international signals, and prohibited simulating attacks or illuminating the bridges of the other side’s ships. It needed no inspectors and no satellites-just an agreed code of conduct and a channel to discuss any incidents that did occur. Years later, naval officials credited the accord with sharply reducing the frequency of dangerous incidents compared with the 1960s.

Confidence building closer to home: India and Pakistan 🔗

The South Asian experience shows how these same elements travel beyond the superpower context. India and Pakistan have built a patchwork of CBMs over four decades, blending communication, constraint, and transparency tools that echo the Cold War originals.

Following the 1971 war, a dedicated hotline was established between the directors general of military operations of both countries-a direct parallel to the Washington-Moscow line. The most durable measure, however, is the Agreement on the Prohibition of Attack against Nuclear Installations. Signed by Rajiv Gandhi and Benazir Bhutto in December 1988 and implemented in January 1992, it requires an annual exchange of lists of nuclear facilities and pledges both sides not to attack them.

This non-attack agreement is remarkable for its longevity. Each January the two countries exchange the coordinates of their nuclear facilities, and they have done so for more than three decades-even during crises and even when official communication has otherwise broken down, making it the longest-lasting confidence-building measure in South Asia. The 1999 Lahore Declaration tried to deepen this framework, with a Memorandum of Understanding that called for advance notification of ballistic missile tests, prompt notification of any accidental or unexplained nuclear incident, and a review of existing hotlines to upgrade them.

The India-China line of actual control 🔗

The same toolkit appears along the disputed border with China. A 1996 agreement committed both sides to enhancing military transparency and included a striking constraint clause: neither side would open fire, use hazardous chemicals, or conduct blast operations within two kilometres of the line of actual control, and developmental blasting required prior notice through diplomatic channels. This is constraint and transparency working together-removing the most dangerous triggers while keeping each side informed of the other’s legitimate activities.

Why these measures matter-and their limits 🔗

The genius of confidence building is that it does not demand friendship or the resolution of the underlying dispute. It only asks that rivals make their behaviour more predictable and keep talking. That modest goal is exactly what makes CBMs achievable between bitter adversaries who would never sign a peace treaty.

They are not a cure-all, however. CBMs have been criticised for a lack of reciprocal effectiveness and have been undermined in regions where no shared beliefs, trust, or common interests exist. The India-Pakistan record illustrates the problem: hotlines have been used only intermittently, and during serious crises important information has not always been passed along in time. A measure on paper is only as strong as the political will to honour it during a crisis. Still, even imperfect arrangements buy something precious-time and a channel to talk-when the alternative is a slide toward war.

What do you think? If a confidence building measure depends on political will that vanishes precisely when tensions are highest, is it still worth building? And in an age of cyber operations and autonomous weapons, what would a modern “Incidents at Sea Agreement” need to look like to keep accidents from becoming wars?

References

1. https://www.britannica.com/topic/confidence-building-measure
2. https://en.wikipedia.org/wiki/Confidence-building_measures
3. https://www.osce.org/secretariat/106440
4. https://www.stimson.org/2012/confidence-building-and-nuclear-risk-reduction-measures-south-asia/
5. https://isis-online.org/uploads/conferences/documents/higginspaper.pdf
6. https://2009-2017.state.gov/t/isn/5191.htm
7. https://nuke.fas.org/control/salt1/intro.htm
8. https://en.wikipedia.org/wiki/National_technical_means_of_verification
9. https://www.csis.org/analysis/ships-and-cyber-transposing-incidents-sea-agreement
10. https://2009-2017.state.gov/t/isn/4791.htm
11. https://en.wikipedia.org/wiki/U.S.%E2%80%93Soviet_Incidents_at_Sea_agreement
12. https://stanleycenter.org/publications/india-pakistan-non-attack-agreement/
13. https://www.armscontrol.org/act/1999-01/press-releases/india-pakistan-agree-security-confidence-building-measures
14. https://www.stimson.org/1996/confidence-building-measures/