Emulating the invisible threat: Army’s C5ISR Center pushes 4ID to the limit at Ivy Mass
By Brian Feeney, DEVCOM C5ISR Center Public Affairs TECHNOLOGY Industry Collaboration Industry technology developers collecting data on their defense system’s performance against incoming UASs at C5ISR’s Warden C-sUAS event at Fort AP Hill May 2026. (Photo credit: Sam Brooks) (Photo Credit: Sam Brooks, C5ISR Center Public Affairs) TECHNOLOGY Assessing Future Investments An industry UAS sensor ready to be tested against incoming UASs in a realistic setting at C5ISR’s Warden C-sUAS event at Fort AP Hill. (Photo Credit: John Martinez, C5ISR Center Public Affairs) TECHNOLOGY Transforming Soldier Protection A simulated UAS swarm attack at C5ISR’s Warden C-sUAS event at Fort AP Hill. (Photo Credit: Dan Lafontaine, C5ISR Center Public Affairs) TECHNOLOGY Assessing Future Investments A laser mounted on an M4 carbine at C5ISR’s Warden C-sUAS event at Fort AP Hill. (Photo Credit: Sam Brooks, C5ISR Center Public Affairs) ❮ ❯ /* CSS Reset and Wrapper */ .mil-carousel-wrapper { font-family: -apple-system, BlinkMacSystemFont, “Segoe UI”, Roboto, Helvetica, Arial, sans-serif; max-width: 1000px; margin: 20px auto; position: relative; box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15); border-radius: 4px; overflow: hidden; background-color: #000000; /* Black background for the whole wrapper */ } .mil-carousel-container { position: relative; width: 100%; } .mil-slide { display: none; width: 100%; } .mil-slide.active { display: block; } /* Image styling */ .mil-image-wrapper { width: 100%; height: 400px; /* Fixed height for consistency */ overflow: hidden; } .mil-slide-image { width: 100%; height: 100%; object-fit: contain; display: block; } /* Caption block below the image */ .mil-caption-container { background-color: #000000; /* Black background */ color: #ffffff; /* White text */ padding: 30px 40px 20px 40px; text-align: left; } .mil-category { display: inline-block; background-color: #ffcc00; /* Army Gold accent */ color: #111; font-size: 11px; font-weight: 800; text-transform: uppercase; padding: 4px 10px; margin-bottom: 12px; letter-spacing: 1px; border-radius: 2px; } .mil-title { margin: 0 0 10px 0; font-size: 28px; font-weight: 700; line-height: 1.2; text-transform: uppercase; letter-spacing: -0.5px; color: #ffffff; } .mil-description { margin: 0; font-size: 15px; line-height: 1.5; color: #cccccc; /* Slightly dimmed white for readability */ } /* Navigation Buttons – Centered over the 400px image */ .mil-prev, .mil-next { cursor: pointer; position: absolute; top: 200px; /* Half of the 400px image height */ transform: translateY(-50%); width: auto; padding: 16px; color: #ffffff; font-weight: bold; font-size: 20px; transition: 0.3s ease; user-select: none; background-color: rgba(0, 0, 0, 0.6); border: none; z-index: 15; } .mil-prev { left: 0; border-radius: 0 3px 3px 0; } .mil-next { right: 0; border-radius: 3px 0 0 3px; } .mil-prev:hover, .mil-next:hover { background-color: #ffcc00; color: #111; } /* Dots Navigation */ .mil-dots-container { text-align: center; padding: 0 0 20px 0; background-color: #000000; } .mil-dot { cursor: pointer; height: 10px; width: 10px; margin: 0 5px; background-color: #444444; border-radius: 50%; display: inline-block; transition: background-color 0.4s ease; } .mil-dot:hover, .mil-dot.active-dot { background-color: #ffcc00; } /* Fade animation */ .mil-fade { animation-name: milFadeEffect; animation-duration: 0.8s; } @keyframes milFadeEffect { from {opacity: .4} to {opacity: 1} } /* Responsive adjustments */ @media only screen and (max-width: 768px) { .mil-image-wrapper { height: 250px; /* Smaller image on mobile */ } .mil-prev, .mil-next { top: 125px; /* Half of the 250px mobile image height */ padding: 12px; font-size: 16px; } .mil-caption-container { padding: 20px 25px 15px 25px; } .mil-title { font-size: 22px; } .mil-description { font-size: 14px; } } let slideIndex = 1; showSlides(slideIndex); // Next/previous controls function moveSlides(n) { showSlides(slideIndex += n); } // Thumbnail image controls function currentSlide(n) { showSlides(slideIndex = n); } function showSlides(n) { let i; let slides = document.getElementsByClassName(“mil-slide”); let dots = document.getElementsByClassName(“mil-dot”); if (n > slides.length) {slideIndex = 1} if (n < 1) {slideIndex = slides.length} for (i = 0; i < slides.length; i++) { slides[i].classList.remove("active"); } for (i = 0; i { clearInterval(slideInterval); }); document.querySelector(‘.mil-carousel-wrapper’).addEventListener(‘mouseleave’, () => { slideInterval = setInterval(function() { moveSlides(1); }, 6000); }); ABERDEEN PROVING GROUND, Md. — In today’s fight, a Soldier’s radio is as critical as their rifle. But what happens when an invisible enemy severs communications at the tactical edge? A team of electronics specialists and computer engineers with the U.S. Army’s Command, Control, Communications, Computers, Cyber, Intelligence, Surveillance and Reconnaissance (C5ISR) Center delivered the answer to the 4th Infantry Division at the Ivy Mass large-scale training exercise this past April and May at Fort Carson, Colorado and the nearby Piñon Canyon Maneuver Site. During a series of vulnerability assessments of the Army’s Next Generation Command and Control network, the team used a ground-breaking technology known as the real-time network effects emulator, or RNEE, to provide simulated electronic warfare effects in denied, degraded, intermittent and limited, DDIL, environments across various communication networks. These vulnerability assessments are critical to expediting the fielding of NGC2, helping to close capability gaps, ensure the technologies work and adapt effectively to real-world conditions, and validate the architecture against critical operational requirements. Training against a contested electromagnetic spectrum is usually incredibly difficult, often requiring extensive coordination through local and federal agencies to avoid disrupting civilian infrastructure. Using a small, ruggedized device, RNEE is installed directly in line with key tactical vehicle communications systems — a “bump in the cable” solution — to mimic the effects of radio frequency jamming and simulating contested network conditions without radiating in the spectrum or disrupting live satellite or cellular commercial networks. Validating the Contested Network The Ivy Mass training exercise was an ideal venue to operate this technology at scale for the first time. For 4ID Soldiers, RNEE created a challenging and highly realistic problem space. When a network goes down, Soldiers must rapidly determine the cause: is it a broken cable, an organic hardware failure, or an active enemy cyber/electronic warfare attack? Once communications are disrupted, units must execute their PACE plan, transitioning from primary to alternate, contingency, and emergency systems. During Ivy Mass, this meant Soldiers and their NGC2 systems had to adapt on the fly. RNEE was deployed within 4ID formations to create an embedded “contested transport” layer for the division’s NGC2 ecosystem. This enables assessment of smart routing, transport resilience and mission command continuity under sustained electronic warfare conditions. Currently, RNEE is a method
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