British Battle Tanks Deploy Within 25 km of Russia’s Border as NATO Rehearses Response to Incursion

Around 1,500 British troops from 4 Brigade deployed to Estonia for Exercise Spring Storm, training with NATO allies and partners within 25 kilometers of Russia’s border, UK Defence Journal reported on June 2.

The exercise included Challenger 2 main battle tanks, which were moved into the theater on heavy equipment transporters. The British battlegroup was built around the 2nd Battalion, the Royal Regiment of Scotland.

According to UK Defence Journal, the battlegroup was tasked with defending against an incursion by an aggressive neighboring state across the border. The training took place in southeastern Estonia, close to Russian territory.

The UK Ministry of Defence said the exercise demonstrated the deployment of NATO’s Forward Land Force, the framework under which the alliance stations multinational combat formations along its northern and eastern flanks.

Images released from the drill showed Challenger 2 tanks being unloaded and maneuvering under smoke during the training, which took place in the second half of May.

British troops have been stationed in Estonia since 2017 under Operation Cabrit, the UK’s contribution to NATO’s enhanced Forward Presence. That mission was established after Russia’s 2014 annexation of Crimea to reassure NATO allies on the alliance’s eastern edge.

The UK leads the multinational battlegroup based at Tapa. Estonia, one of the Baltic states sharing a land border with Russia, has long called for a visible allied military presence to deter possible aggression.

NATO’s Forward Land Force concept has evolved further since Russia’s full-scale invasion of Ukraine in 2022. The alliance agreed to scale its eastern battlegroups toward brigade strength where needed, with framework nations committing additional forces that can deploy rapidly.

For the UK, that means maintaining a standing presence in Estonia while keeping a larger formation ready to reinforce the country if required. Exercises such as Spring Storm are designed to rehearse exactly that.

Exercise Spring Storm, known in Estonia as Kevadtorm, is the Estonian Defence Forces’ main annual field exercise. It brings together Estonian regular troops, reservists, conscripts, and allied units.

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Holding the drill in southeastern Estonia places NATO forces in terrain that would be critical in the event of a real incursion. The exercise also tests the movement of heavy armor, command post operations, and battlefield coordination under field conditions.

Earlier, NATO initiated major military exercises just 30 kilometers from the Finnish-Russian border, involving 9,000 personnel from seven member states.

This year’s “Northern Star” drills feature troops from Finland, the United States, Poland, the United Kingdom, France, Italy, and Hungary.

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