NATO’s multinational battlegroup in Estonia put their trench warfare skills to the test, drawing lessons from Ukraine’s defence efforts. Facing off against a British and French opposing force equipped with Warrior infantry fighting vehicles and Challenger 2 tanks, Estonian military conscripts were tasked with defending a trench system. The exercise tested both sides: for the Estonians, it was about resilience and tactical discipline under fire; for the British and French, it was about mastering