Our Producer Joe follows the British Army's Light Dragoons and the King's Royal Hussars as they test their ability to deploy troops and armoured vehicles to Poland where they link up with Polish and other NATO allies in a full on combined arms military exercise.

We cover 2500km, witnessing all the moving parts of a mass mobilisation as well as speaking to the people that make them move.

Ever wondered how an exercise like this takes place? This is your fly on the wall experience of a NATO exercise, at the height of tensions with Russia.