A series of live flight trials were conducted in September 2014, successfully validating a number of SESAR Solutions for civil-military interoperability. Specifically, the validation campaign demonstrated how a ground interface can enable the exchange of air-ground data messages between military aircraft and Air Traffic Management (ATM) ground systems for controller–pilot data link communications (CPDLC) and initial four-dimensional trajectory management (i4D), and how Automatic Dependent Surveillance – Broadcast (ADS-B) can be  enabled onboard military aircraft using existing military transponders. The outcomes of this campaign provide unprecedented evidence that modern military aircraft can be interoperable  within a SESAR environment in a cost-effective way.