At first glance, defence would rarely be seen as a domain affected by the Covid-19 pandemic. Yet, the disruption brought by the virus into our societies can significantly impact the security environment. The strong pressure on healthcare systems, together with the necessity to relaunch the economy, would inevitably weigh heavily on defence budgets. Reduced revenue from taxes and the urgency to fight the pandemic, support suffering businesses and people, will potentially reduce allocations for defence budgets. This, however, comes at a time where global security is deteriorating, and defence forces are facing multiple and diverse threats. They have also been often called to help in another war, the one against the virus.