Air collaborative combat will involve future combat air systems, manned or unmanned platforms, legacy platforms and their evolution, including sensors and effectors. The EICACS project (European Initiative for Collaborative Air Combat Standardization) aims at ensuring the interoperability of such assets and a seamless integration of future combat air systems.Co-funded by the European Union. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the granting authority can be held responsible for them.