As the war in Ukraine grinds into its fourth year and Russia steps up provocations along NATO’s borders, the West finds itself at a pivotal moment in history. Threatened by Russia’s renewed belligerence and amid growing uncertainty over President Trump’s commitment to defending Europe and the Western Alliance, the stakes could not be higher. With exclusive access to the inner workings of NATO throughout 2025, this landmark series takes viewers deep inside the rooms, command centres and trenches where Europe’s fate is being decided. From underground command bunkers in Naples to the frozen forests of Estonia, from British convoys hauling a fully operational land army thousands of miles across Europe to marines storming beaches from air and sea, cameras follow the soldiers, commanders and support teams preparing for a conflict with Russia that feels closer by the day.