Russia–NATO (Baltic)
›Two non-kinetic outcomes
A 90% chance the coming year stays below the threshold of combat — dense gray-zone pressure on NATO’s Baltic flank, the alliance tripwire holding the kinetic tail low.
This decomposition reflects SIGMA's published judgement as of the assessed date. It is a committed, point-in-time position rather than a live figure; ongoing working analysis is available to members.
- 1997NATO and Russia sign the Founding Act establishing the NATO-Russia Council.
- 2004Estonia, Latvia and Lithuania join NATO, and Baltic Air Policing begins.
- 2007Estonia is hit by large-scale cyberattacks amid a dispute with Russia.
- 2014NATO adopts a Readiness Action Plan to reinforce its eastern flank.
- 2016NATO agrees to deploy multinational battlegroups to the Baltic states and Poland.
- 2018The United States begins rotating armoured brigades through the Baltic region.
- 2022NATO activates its defence plans and scales up its forward-deployed battlegroups.
- 2023Finland joins NATO.
- 2024–2025NATO sustains Enhanced Forward Presence rotations and expands Baltic air policing.
- Mid-2025Finland and Sweden complete integration into NATO command and exercise structures.
- September 2025Poland reports a Russian drone airspace breach, raising eastern-flank alert levels.
Curated for strategic significance, not completeness. The timeline provides context; the Foundation Paper explains the assessment.
The map of this contest was redrawn in 2023 and 2024, when Finland and then Sweden joined the alliance and the Baltic became, in coastline terms, very nearly an allied sea. Russia retains two footholds on it: the approaches to St Petersburg at its eastern end, and the Kaliningrad exclave on its southern shore—a militarised territory separated from Russia proper and embedded in alliance coastline, at once a bastion inside the ring and a hostage to it.
What lies between those footholds is an enclosed, shallow, extraordinarily busy sea, floored with the cables and pipelines that carry Northern Europe's data and energy. That configuration explains the shape of the contest better than any doctrine. A conventional naval challenge in these waters is one Russia would lose, and has not attempted. What the sea offers instead is density—merchant traffic in which a shadow fleet can hide, seabed infrastructure that a dragged anchor can sever, airspace so trafficked that a violation is a weekly event. It is a theatre in which harm is easy, attribution slow and presence deniable—and every one of those properties favours the form of pressure actually being applied.
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The reasoning behind the forecast.
The Foundation Paper sets out the complete analytical case behind this assessment — the strategic dynamics, the incentives, the competing pathways, and the calibration.
The reasoning behind the forecast.
The Foundation Paper sets out the complete analytical case behind this assessment — the strategic dynamics, the incentives, the competing pathways, and the calibration underlying SIGMA's published forecast. Membership opens this, and the wider body of work as it develops.
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