There is a significant shortfall in required live aggressor support for 5th-generation airborne training. A live Virtual Constructive (LVC) environment could significantly reduce this shortfall by utilizing virtual and constructive forces to supplement live aggressors. However, creating a robust LVC environment capable of supporting advanced airborne tactical training has many challenges including information assurance, platform integration, spectrum availability/compatibility, latency, reliability, and high data throughput requirements. Advanced aircraft sensor simulations require accurate data, driving the need for reliable, low-latency networks. Data exchanged over these networks must be integrated into live avionics systems in real-time to maintain data fusion and prevent negative training while minimizing platform impact and cost. There is significant pressure to sell off the 1780–1850 MHz spectrum that is currently in use by military and training ranges. The DOD is being mandated to either move to other less efficient spectrum bands or cohabit with civilian cell phone systems. To address this mandate and further explore requirements for an on-aircraft LVC instantiation, the US Air Force Research Laboratory is conducting an Advanced Technology Demonstration called Secure LVC Advanced Training Environment (SLATE). SLATE is maturing a spread-spectrum waveform named 5th-Generation Advanced Training Waveform (5G-ATW) to test the feasibility of cohabiting with civilian systems that desire to use the 1780–1850 MHz band while providing low latency and high data rates. 5G-ATW will provide the airborne network between live aircraft and ground-based simulation systems to create the LVC environment. 5G-ATW is being integrated into a modified P5 Air Combat Maneuver Instrumentation (ACMI) system and flight tests are to begin in 2018 on an F-15E Strike Eagle modified to support a tactically relevant LVC environment. This paper will discuss technical approaches utilized on SLATE to address design challenges, present findings on the 5G-ATW waveform, and summarize LVC airborne training challenges for advanced platform tactical training.