Military Exercises and Diplomacy: War Games as Messages

A military exercise is a drill in which real units deploy and operate according to a tactical or operational scenario. It's used to train, to test procedures and equipment, and to check whether a force can move and sustain itself where it claims it can. But beyond that internal function, it also has an external one: other states watch it, measure it, and draw conclusions. That's why exercises have, for decades, been a diplomatic tool as much as a military one.

This article explains what types of exercises exist, what message they convey, and what formal mechanisms states use to try to prevent an exercise from being mistaken for attack preparation.

What exactly a military exercise is

Very different activities in scale and purpose share the same term:

• Command post exercises: only staffs and communications systems are deployed; large units don't move. They're related to war games.
• Field exercises: real units maneuver on the ground with their equipment, sometimes with live fire.
• Deployment exercises: logistics itself is what's being tested, that is, the ability to move a force from its base to a distant theater.
• Combined or multinational exercises: several countries and armies take part, and their added value is interoperability of procedures and communications.

The distinction matters for reading its political meaning. A command post exercise barely shifts the balance on the ground; a deployment exercise that moves tens of thousands of soldiers across a continent demonstrates a very concrete capability and is interpreted as such.

The exercise as message

In classical deterrence theory, formulated by authors such as Thomas Schelling, credibility doesn't depend only on having capability, but on the adversary believing it exists and can be used. An exercise is a relatively cheap and reversible way of making that capability visible: there's no combat, no casualties, and the force goes home when it's over.

There are usually three messages. To the adversary: we can get here, within this timeframe and with this volume. To allies: the defense commitment is material, not just a signed text. And to one's own public opinion and parliament: the defense budget produces verifiable capabilities.

NATO publishes information about its major allied exercises, including the transatlantic deployment series that rehearse moving US forces to Europe, and Russia has historically held large annual strategic exercises known by their regional names, such as Zapad in the western direction. In both cases, public communication is part of the exercise: participant numbers and stated goals are released precisely because the intended audience isn't only the troops themselves.

Ambiguity: when an exercise raises concern

The problem is that an exercise and a buildup ahead of an offensive look very similar from the outside: in both cases units, equipment and supplies are massed near a border. That ambiguity can be used deliberately as cover, and it can also generate unwanted spirals of tension, when the other side responds with its own precautionary deployment.

Hence the importance of declared numbers, announced duration and, above all, whether the forces return to their bases when it's over. Independent analysts and specialized institutions — IISS with The Military Balance, or SIPRI in its yearbooks — track these indicators to distinguish training from operational preparation.

Transparency mechanisms: the Vienna Document

To reduce that uncertainty, Europe has a specific framework: the OSCE's Vienna Document, a set of confidence- and security-building measures agreed among participating states. Its logic is simple: it requires advance notification of certain military activities above given personnel and equipment thresholds, allows observers to be invited to the largest ones, and provides for evaluation visits and annual exchanges of military information.

The regime doesn't stop a state from preparing for war, but it raises the political cost of surprise: a state that fails to notify, or that splits an activity to stay below the thresholds, is also sending a message. Its effectiveness depends on voluntary compliance and the general political climate, and its operation has itself been the subject of debate and modernization proposals within the OSCE.

Conclusion

Exercises are training and communication at the same time. Understanding the diplomatic side — who the message is aimed at, what is declared and what is left out, whether observers are present — allows one to read news about deployments without falling into either alarmism or indifference. The line with a show-of-force deployment is thin, and that's the subject of the next article in this section.