For four weeks this September, the high desert around Yuma Proving Ground, Arizona, hosted a counter-drone experiment with at least 20 vendors, the first Falcon Peak to use a single piece of command-and-control software as its baseline. The software was Anduril Industries' Lattice platform. The exercise was Falcon Peak 26.2, U.S. Northern Command's fourth iteration of its signature counter-small-unmanned-aircraft-systems experiment, and this time the target wasn't a hypothetical adversary drone over a domestic base — it was the threat picture along the 1,954-mile U.S.-Mexico border.

According to an official U.S. Northern Command press release dated Aug. 31, 2026 — read via a Wayback Machine snapshot after the original northcom.mil page began returning an access-denied error to direct fetches — NORTHCOM and Joint Interagency Task Force 401 ran Falcon Peak 26.2 from Aug. 31 to Sept. 25, 2026. The release describes it plainly: "This experiment is designed to address the unique challenges of C-sUAS at the Southern Border and will demonstrate new technologies, expand focus on low-collateral defeat capabilities, enhance collaboration with mission partners, and provide industry with immediate feedback to accelerate the maturation of innovation capabilities with Department of War-wide applicability." It's the fourth Falcon Peak overall, and the first held at Yuma.

Three Lanes, One Backbone

At least 20 vendors put systems through somewhere between 15 and 30 intercept attempts apiece, organized into three testing lanes, according to DefenseScoop's reporting from the exercise: drone-on-drone interceptors, kinetic and ballistic mitigation — largely shotgun-based systems — and sensing and detection.

What set 26.2 apart from its three predecessors wasn't the hardware, though. It was the plumbing underneath it. For the first time, Falcon Peak used Anduril's Lattice software as the baseline standard, and the test organization itself hosted the Lattice capability. Robert Fletcher, Yuma Proving Ground's sensor branch team lead, told DefenseScoop: "Usually, the customer has a version of Lattice, and they're bringing in systems to integrate on that. This is the first go-around where the test organization has the Lattice capability." JIATF-401 selected Lattice under an $87 million Army Enterprise Agreement.

"You can't fight what you can't see," Northcom spokesperson Becky Farmer told DefenseScoop, a line that captures the exercise's underlying logic: before shotguns or interceptor drones can do anything useful, sensors scattered across a border-length test range have to report into a single picture that every vendor's system can read from and write to.

Why Falcon Peak Exists at All

Falcon Peak didn't emerge from a border crisis. It emerged from a basing one. Breaking Defense reported in October 2025 that the series was NORTHCOM's answer to a persistent, unglamorous problem: unidentified drones flying over U.S. military installations on American soil, day after day, with no fast, reliable, service-wide way to detect or stop them. Falcon Peak became the venue where the Pentagon could put competing counter-drone systems on a range together, under realistic conditions, and rapidly figure out which ones were worth fielding.

That mission has since broadened. Falcon Peak 26.2 was the fourth iteration in the series NORTHCOM has run since October 2024, when it became the Pentagon's lead synchronizer for domestic counter-UAS testing; Brig. Gen. Jason “Ox” Rueschhoff has already previewed a fifth, urban-focused demonstration still to come, according to a second DefenseScoop report published Sept. 25, 2026, the day the Yuma exercise was scheduled to end. Falcon Peak 26.2's border focus is the latest expansion of that mandate — moving the series from protecting fixed installations toward securing a stretch of geography nearly 2,000 miles long, where drones might be surveilling border infrastructure, smuggling contraband, or simply testing U.S. detection gaps.

Why It Matters

Falcon Peak 26.2 ran on a commercial, vendor-built command-and-control layer, Anduril's Lattice, hosted by the test organization. Standardizing on it let NORTHCOM test sensors and effectors from at least 20 companies against a common baseline. That is also this article's analysis: a test built around one commercial platform ties the results to that platform, and the sources do not say how that will play out in future exercises.

There's a second, more immediate stake: none of this happened in a vacuum. It happened at Yuma, in open desert, where a system that shoots down the wrong thing mostly just puts a hole in sand. That will not be true of what comes next.

Next Stop: A City

NORTHCOM has already said where the counter-drone program goes from here, even if it hasn't said exactly where the "here" is. The command's next major demonstration will be held in a dense urban environment for the first time — a shift DefenseScoop's Sept. 25 report frames as introducing an entirely different set of problems: buildings that block or multipath radar returns, civilians moving through the engagement zone, and collateral-damage and rules-of-engagement questions that simply don't arise when the nearest structure is miles away.

"Homeland defense is not about protecting from outside, it's also protecting inside," Brig. Gen. Jason "Ox" Rueschhoff said, according to DefenseScoop — a statement that reframes counter-UAS not as a perimeter problem but as one that follows the drone wherever it flies, including over American cities.

The location and date of that urban iteration haven't been announced. But the shift itself tells you what NORTHCOM learned at Yuma isn't really about whether a shotgun round can stop a small drone in open air. It's about whether at least 20 different companies' hardware can be knitted into one coherent picture fast enough to matter, on a common Lattice baseline. The desert was the easy version of that test. The city is next.

Sources

Correction, Sept. 29, 2026: An earlier version of this article said the government rents or does not own Lattice, said past Falcon Peaks used vendor-proprietary command-and-control stacks, placed the Dronebuster at the exercise, and said the Sept. 25 DefenseScoop report came two days after the exercise ended. DefenseScoop reports only that this was the first Falcon Peak with Lattice as the baseline and the test organization hosting it, that at least 20 vendors took part, and that JIATF-401 selected Lattice under an $87 million Army Enterprise Agreement; the Sept. 25 report was published as the exercise was ending.