Unmanned systems have become indispensable in both civilian and military contexts, playing a crucial role in the contemporary operational landscape. These systems have the potential to transform the way military operations are conducted, offering improved efficiency, reduced risks to human personnel and enhanced collaborative capabilities. Nevertheless, realising their full potential requires overcoming interoperability challenges to enable diverse unmanned platforms to work together effectively when integrated within a mission operation network. The European endeavour to tackle this challenge is pursued through the Interoperability Standards for Unmanned Armed Forces Systems (INTERACT) project, aiming at developing a common basis for a European interoperability standard to enhance military operation capability. This Info Flash explores the growing capabilities of unmanned systems in military operations and delves into the complex challenge of interoperability, highlighting the role of the European INTERACT project in enhancing the efficiency and cooperation capabilities of European armed forces.