The biggest military-led #cyber exercise in Western Europe took place in Tallinn, Estonia with 34 teams from 11 countries, including Ukraine, going into a live-fire cyber battle. Organised by a team of cyber specialists from the British Army, #DefenceCyberMarvel2 (DCM2) was the culmination of more than 12 months of training for more than 750 cyber specialists, including Defence personnel, government agencies, industry partners, and other nations. Nearly 900 personnel from the #BritishArmy, Royal Navy and RAF took part along with teams from the armed forces of several other countries.