The site of the military exercise, Tapa base, is Estonia’s largest and one of the closest of any NATO member to the Russian border. As the Lennart Meri Conference brings experts from around the world to the capital Tallinn, British, French, Estonian and other country forces are descending on the base in preparation for Spring Storm.

The exercise is meant to test how allied forces will perform in the event of a Russian military attack. Reports say the UK has dispatched Wildcat and Apache attack helicopters, while France has sent VBMR Griffon armored personnel carriers, AMX-10 RC fighting vehicles and Caesar self-propelled howitzers.

“Here we’re in a defensive mission alongside our other allies,” including NATO troops, French Maj. Jean Christophe told Arab News. “We’re maybe about 400 French people on this exercise, and we’ll do the exercise with British troops and the Estonians.”

The UK has confirmed its participation, as part of a bilateral agreement with Estonia, in “a multilateral exercise supporting the Estonian Defense Forces and the aircraft we deployed.”

Col. Al Rivett of the British Army Air Corps said: “One of the key reasons that we do deployments such as this is to provide aviation support to the Estonian Defense Forces so they get effectively used to operating with aircraft such as these.”

Spring Storm will involve “combined arms,” an approach to warfare that seeks to integrate different combat arms of a military to achieve mutually complementary effects — for example, using infantry and armor in an urban environment in which each supports the other.

“The enhanced forward presence battle group is a force that is assigned to NATO under SACEUR (Supreme Allied Commander Europe),” Rivett said.

“Under that agreement and, effectively, that force is always aligned to NATO and is formally attributed to him for the SACEUR to use as he sees fit.”

Spring Storm is one of a number of military exercises that NATO countries intend to hold with the objective of sending a clear message to Kremlin. The exercises have grown bigger and more elaborate since last year when Russia invaded Ukraine.

Data from NATO shows it plans to stage 18 military exercises, involving thousands of troops, between May and September this year.