The head of the United Kingdom’s armed forces has warned that Russia represents a serious and enduring threat to the country, stating that Britain must be ready to defend itself and that future generations may be called upon to fight.

The remarks, delivered in a recent address to military and policy audiences, underscored the gravity of the current security environment and the need for sustained preparedness.

The armed forces chief said Russia’s actions and posture have fundamentally altered the European security landscape, requiring the UK to take a clear-eyed view of the risks it faces.

He stressed that deterrence depends not only on advanced capabilities and alliances, but also on national resolve and readiness, including the willingness of citizens to support the defence of the country if required.

The warning comes amid heightened tensions between Russia and Western nations, continued conflict in Eastern Europe, and increased military activity across the region.

UK defence planners have been reviewing force readiness, stockpiles and training, while strengthening cooperation with allies to ensure collective security.

The armed forces chief emphasised that preparation now is essential to prevent conflict later, arguing that credible defence reduces the likelihood of aggression.

Government officials have echoed the importance of resilience, investment and long-term planning in defence, noting that the UK faces a more contested and unpredictable world.

The armed forces leadership said that clear communication with the public about risks and responsibilities is part of ensuring national security, as Britain adapts to a more demanding strategic era.