Summary and Key Points: Defense analyst Harrison Kass evaluates the tactical lessons from the F-35 Lightning II’s 2017 Red Flag performance at Nellis AFB.
-Despite a dominant 20:1 kill ratio driven by AESA radar and stealth, the exercise revealed that numerical superiority—specifically F-16 swarm tactics—can exhaust the F-35’s internal carriage of four AMRAAMs.
-This report analyzes the transition from Beyond-Visual-Range (BVR) dominance to the “merge,” where stealth advantages diminish against infrared missiles.
-Kass explores the strategic shift toward Loyal Wingman drones to augment magazine depth, concluding that mass remains a decisive quality in 21st-century aerial warfare.
The 20:1 Paradox: Why the F-35’s Staggering Red Flag Success Still Exposed a Fatal Flaw
At Red Flag 2017, the F-35 Lightning II reportedly achieved a 20:1 kill ratio. On paper, the results are staggering—reinforcing the aircraft’s reputation as a fifth-generation force multiplier. But buried in that success were moments where aggressor F-16 pilots managed simulated kills.
The tactic: overwhelm the F-35 with swarms. The results demonstrated that the F-35’s strength in networked BVR combat is real—but also highlighted a vulnerability when missile capacity and geometry are stressed to the breaking point.
What is Red Flag?
Red Flag, hosted at Nellis AFB, is a high-end air combat exercise. Designed to simulate peer conflict, aggressor squadrons are used to replicate advanced adversaries. The exercises are designed to stress tactics, expose weaknesses, and train in contested environments.
Kill ratios in Red Flag are not marketing metrics but takeaway tools for learning new lessons.
The F-35 on Paper
A U.S. Air Force F-35A Lightning II pilot assigned to the 355th Expeditionary Fighter Squadron taxis on the flightline at Marine Corps Air Station Futenma, Japan, during a routine 18th Wing readiness exercise at Kadena Air Base, Japan, May 6, 2025. The U.S. Air Force continues to work on its ability to meet new challenges in dynamic environments. In line with this direction, U.S. Pacific Air Forces is constantly evaluating and validating new warfighting concepts. (U.S. Air Force photo by Senior Airman Catherine Daniel)
Airmen from the 757th Aircraft Maintenance Squadron talk about their execution plan next to an F-35 Lightning prior to the start of weapons load crew competition at Nellis Air Force Base, Nevada, Oct. 16, 2020. Throughout the year weapons crews are put to the test of safely loading and unloading ordinance to their respective aircraft in front of their peers while being timed. At the end of the year, the winners from each event are pitted against each other to see which team is the best. (U.S. Air Force photo by Tech. Sgt. Alexandre Montes)
The stealth fighter integrates AESA radar, Distributed Aperture System (DAS), electro-optical targeting, and off-board data links to provide unmatched situational awareness, one of the greatest advantages of the airframe. Another cutting-edge advantage: stealth.
The F-35 has a low radar cross-section (RCS), reducing the detection window and enabling first-look/first-shot advantages. The F-35 is also networked, acting as a sensor node that can share targeting data and extend awareness across the entire force structure. The result of these advantages: the F-35 often fires first, often engages beyond-visual-range, and avoids merges.
20:1 Kill Ratio
The F-35’s Red Flag 2017 kill ratio of 20:1 reflects dominance in BVR engagement, information superiority, and integrated air battle.
Aggressors were frequently killed before they even knew they were targets—that’s the F-35’s stealth, sensors, and tactics working as designed, exactly the missions the F-35 was built for.
Swarm Tactics
Yet the F-35 seemed to have a vulnerability. Aggressor F-16s reportedly used numerical superiority, multi-axis attacks, and saturation geometry. Basically, the F-16s swarmed the F-35. This forced the F-35 to expend missiles, compress the engagement distance, and create merges—resulting in an overwhelming defensive scenario.
This exposed the F-35’s key limitation: limited internal weapons payload. When operating in stealth configuration, the F-35 typically only carries four AMRAAMS. Once these four missiles are expended, the F-35 must disengage—or merge for a WVR engagement.
Stealth offers advantages, of course, but one of the drawbacks is internal carriage requirements, which reduce payload. Finite BVR shots per sortie are a problem against large formations. The F-16s identified and exploited this limitation.
WVR Realities
NAS PATUXENT RIVER, Md. — An F-35 Lightning II test pilot conducts the first flight test to certify the F-35B short takeoff and vertical landing variant of the fighter aircraft for carrying the AGM-158C Long-Range Anti-Ship Missile (LRASM). As part of ongoing weapon integration efforts, the Pax River F-35 Integrated Test Force (Pax ITF) team for the first time flew test flights Jan. 14 with two AGM-158 loaded on external stations. LRASM is a defined near-term solution for the Offensive Anti-Surface Warfare (OASuW) air-launch capability gap that will provide flexible, long-range, advanced, anti-surface capability against high-threat maritime targets. The Pax River ITF’s mission is to effectively plan, coordinate, and conduct safe, secure, and efficient flight test for F-35B and C variants, and provide necessary and timely data to support program verification / certification and fleet operational requirements.
U.S. Air Force Maj. Kristin “BEO” Wolfe, F-35A Lightning II Demonstration Team pilot and commander, flies an aerial performance for the 2021 Arctic Lightning Air Show, July 30, 2021, Eielson Air Force Base, Alaska. The F-35 Demonstration Team utilized F-35s from the 354th Fighter Wing in order to showcase the combat capability of the Pacific Air Force’s newest F-35 units. (U.S. Air Force photo by Capt. Kip Sumner)
In close-range engagements, stealth advantage diminishes, and infrared missiles dominate. The stealth fighter was not built to dominate; it’s not even that maneuverable. Instead, the F-35 was designed to avoid merges.
But the F-16 pilots, understanding this asymmetry and relying on their advanced dogfighting skill set, forced the merge—at which point pilot proficiency and geometry mattered more than stealth, networking, or sensor fusion.
Historical Precedent
Air combat history has repeatedly shown that quality can dominate, yes, but quantity still has influence. In World War II, Korea, and Vietnam, swarm tactics and mass formations were used with success.
The modern parallel is clear; in Ukraine, Russian drone/missile swarms are being used to overwhelm Ukrainian air defense systems; in the Middle East, Houthi rebels are using drone swarms to complicate US aircraft carrier operations.
The Red Flag 2017 incident applies these tactics to air combat, forcing the fifth-generation fighter to adapt to a mass threat environment.
Strategic Implications
A U.S. Air Force F-35A Lightning II assigned to the F-35A Lightning II Demonstration Team performs a practice airshow performance at Hill Air Force Base, Utah, Jan. 11, 2023. The F-35 Demo Team performs rehearsal flights regularly to maintain required flying certifications and to uphold and maintain their mission and Air Force recruiting standards. (U.S. Air Force photo by Staff Sgt. Kaitlyn Ergish)
A crew chief assigned to the 158th Fighter Wing, taxis an F-35A Lightning II fifth generation aircraft assigned to the wing at the Vermont Air National Guard Base, South Burlington, Vermont, May 2, 2022. The aircraft departed to Spangdahlem Air Base, Germany, to continue NATO’s Enhanced Air Policing mission along the Eastern Flank. (U.S. Air Force photo by Tech. Sgt. Richard Mekkri)
The stealth fighter excels in sensor-driven warfare and coalition integration. But saturation tactics stress any system. The F-35 rarely fights alone operationally; it is supported with AWACS, tankers, EW, and other fighters. In real combat, the F-35’s magazine depth would be augmented through support systems.
Yet, the single platform’s limited magazine depth is a point of concern. That’s partially why the loyal wingman drone concept is being pursued so aggressively; the
Still, the 2017 incident does not invalidate the F-35’s doctrine, and certainly does not prove the F-16 is superior. The incident exposes a weakness in an aircraft that is generally well-suited for modern warfare.
And the 20:1 kill ratio still shows F-35 dominance; the swarm tactics prove, however, that no platform is immune to saturation.
About the Author: Harrison Kass
Harrison Kass is an attorney and journalist covering national security, technology, and politics. Previously, he was a political staffer and candidate, and a US Air Force pilot selectee. He holds a JD from the University of Oregon and a master’s in global journalism and international relations from NYU.
