U.S. Army hypersonic weapons

What is LRHW (Long-Range Hypersonic Weapon)?

The Long-Range Hypersonic Weapon (LRHW), also known as Dark Eagle, is a U.S. Army intermediate-range, boost-glide hypersonic missile system. It is designed to deliver conventional, precision strikes at extreme ranges—currently estimated around 1,725 miles—by launching a booster which then releases a unpowered Common Hypersonic Glide Body (C-HGB) that glides at hypersonic speeds toward its target.

LRHW is among the U.S. hypersonic programs intended to counter growing global competition in hypersonic and anti-access/area-denial (A2/AD) systems. The design seeks to be both responsive to time-sensitive threats and effective against heavily defended targets.

Recent Progress and Deployment

• The Army has confirmed that its first operational LRHW battery is scheduled to be fielded by the end of Fiscal Year 2025.
• A battery consists of four launchers and eight hypersonic missiles (All-Up Rounds plus canisters), together with a Battery Operations Center (BOC) and necessary support vehicles.
• In mid-2025, LRHW was deployed outside the continental United States for the first time: two missile launchers were sent to Australia as part of Exercise Talisman Sabre 2025.
• This forward deployment underscored the Army’s ability not only to deploy and support LRHW overseas, but also to integrate it into operational command and control and mission exercises in the Indo-Pacific region.

Delays, Testing, and Cost Trends

Despite its rapid advancement, LRHW has faced several hurdles:

• Testing delays and cancellations have pushed back original deployment goals. For instance, a planned flight test in late FY2022/early FY2023 was delayed to allow for analysis of failures from prior tests.
• The Army acknowledged it would miss its FY2023 target for fielding the first battery.
• According to the Government Accountability Office (GAO), the estimated cost of fielding the first LRHW battery increased (by about $150 million) owing to higher missile costs, testing issues, investigation, and retests.

Strategic Context and Why It Matters

The LRHW system is part of the U.S. effort to modernize its long-range precision fires and strike capabilities in the face of evolving threats from near-peer competitors, especially in the Indo-Pacific theater. Its capability to strike over long distances, at hypersonic speeds, and with maneuvering glide bodies makes it harder to detect and intercept compared to traditional ballistic or cruise missiles.

The forward deployment to Australia—via the 3rd Multi-Domain Task Force—serves multiple strategic aims: demonstrating rapid deployment ability, enhancing deterrence with allies, improving interoperability, and signaling to adversaries that the U.S. can project this advanced firepower in contested regions.

Outlook: What’s Next for LRHW

• The Army intends to test a version of the missile with “minor modifications” in Q4 of FY2025, ahead of fielding the second battery in Q4 FY2026.
• Ground support equipment contracts and procurement for Battery 3 are underway, although some schedules slipped due to funding and program delays. C
• Alongside these deployments, the Army is under pressure to refine cost predictions, improve test reliability, and incorporate modern engineering practices (such as digital engineering / digital twins) to reduce risk. GAO has specifically recommended the LRHW program assess how to better use such tools.

Challenges & Risks

While LRHW is making tangible progress, several risks remain:

1. Cost Overruns – The inflationary pressures in missile components, testing, and logistics support remain a concern for sustaining production beyond the first battery.
2. Technical Reliability – Hypersonic systems are exceptionally demanding from engineering, materials, thermal protection, and glide body performance perspectives. Failed or delayed tests have been a recurrent issue.
3. Strategic Stability and Arms Control – Increasing deployment of hypersonic weapons may complicate crisis stability, raising concerns among rivals, and could provoke arms racing if not managed transparently.
4. Operational Integration – Deploying the LRHW overseas (e.g., Australia) requires not only moving the launchers but also ensuring secure command, protocols, logistical support, and coordination with allies and forward postures.

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