The following is the April 24, 2025, Congressional Research Service In Focus report, The U.S. Army’s Long-Range Hypersonic Weapon: Dark Eagle.
What Is the Army’s Long-Range Hypersonic Weapon?
The Army’s Long-Range Hypersonic Weapon (LRHW), also known as Dark Eagle (Figure 1), with a reported range of 1,725 miles, consists of a ground-launched missile equipped with a hypersonic glide body and associated transport, support, and fire control equipment. According to the Army,
This land-based, truck-launched system is armed with hypersonic missiles that can travel well over 3,800 miles per hour. They can reach the top of the Earth’s atmosphere and remain just beyond the range of air and missile defense systems until they are ready to strike, and by then it’s too late to react.
The Army further notes,
The LRHW system provides the Army a strategic attack weapon system to defeat Anti-Access/Area Denial (A2/AD) capabilities, suppress adversary long-range fires, and engage other high payoff/time critical targets. The Army is working closely with the Navy in the development of the LRHW. LRHW is comprised of the Common Hypersonic Glide Body (C-HGB), and the Navy 34.5-inch booster.
On April 24, 2025, the Army formally designated the LRHW as the Dark Eagle.
LRHW Components
Missile
The missile component of the LRHW is reportedly being developed by Lockheed Martin and Northrop Grumman. When the hypersonic glide body is attached, it is referred to as the Navy-Army All Up Round plus Canister (AUR+C). The missile component serves as the common two-stage booster for the Army’s LRHW and the Navy’s Conventional Prompt Strike (CPS) system, which can be fired from both surface vessels and submarines.
Common Hypersonic Glide Body (C-HGB)
The C-HGB is reportedly based on the Alternate Re-Entry System developed by the Army and Sandia National Laboratories. Dynetics, a subsidiary of Leidos, is currently under contract to produce C-HGB prototypes for the Army and Navy. The C-HGB uses a booster rocket motor to accelerate to well above hypersonic speeds and then jettisons the expended rocket booster. The C-HGB, which can travel at Mach 5 or higher on its own, is planned to be maneuverable, potentially making it more difficult to detect and intercept.
LRHW Organization and Units
The LRHW is organized into batteries. According to the Army “a LRHW battery consists of four Transporter Erector Launchers (TELs) on modified M870A4 trailers, each equipped with two AUR+Cs (eight in total), one Battery Operations Center (BOC) for command and control, and a BOC support vehicle.”
The 5th Battalion, 3rd Field Artillery Regiment at Joint Base Lewis-McChord, WA, was designated to operate the first battery of eight LRHW missiles. The battalion, also referred to as the Long-Range Fires Battalion, is part of the Army’s 1st Multi-Domain Task Force (MDTF), a unit in the Indo-Pacific-oriented I Corps stationed at Joint Base Lewis-McChord, WA. Other LRHW batteries are planned for Long-Range Fires Battalions in the remaining MDTFs scheduled for activation.
LRHW Testing and Program Activities
According to a 2023 Congressional Budget Office (CBO) Study, “U.S. Hypersonic Weapons and Alternatives,” “Extensive flight testing is necessary to shield hypersonic missiles’ sensitive electronics, to understand how various materials perform, and predict aerodynamics at sustained temperatures as high as 3,000° Fahrenheit.” The Army originally planned for three flight tests of the LRHW before the first battery fielding in FY2023. On October 21, 2021, the booster rocket carrying the C-HGB vehicle reportedly failed a test flight, resulting in what defense officials characterized as a “no test” as the C-HGB had no chance to deploy. Reportedly, a June 2022 test of the entire LRHW missile also resulted in failure.
Download the document here.
