Within Layered Defence
How Drone Raids Drain Missile Defenses
Mass drone raids are dangerous partly because they force defenders to spend limited interceptors before the highest-risk threats appear.
On this page
- Why cheap drones stress expensive defenses
- What salvo competition means for magazines
- How a laser layer changes the numbers
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Introduction
Drone saturation attacks are dangerous not simply because they place many aircraft in the sky at once, but because they force defenders into a resource-allocation problem. When dozens or hundreds of inexpensive drones arrive together, air-defence operators must decide which targets justify the use of finite interceptor missiles. If enough low-cost threats appear, missile inventories can be depleted before more dangerous cruise missiles, ballistic missiles, or aircraft enter the battle. Recent conflicts have shown that saturation is often an economic and logistical strategy as much as a kinetic one. In that environment, the value of directed-energy weapons lies less in replacing missiles than in preventing cheap drones from consuming them. [CSIS]csis.orgdrone saturation russias shahed campaignDrone Saturation: Russia's Shahed Campaign13 May 2025 — Russia's drone campaign utilizes inexpensive Shahed drones to saturate Ukrain…
Why Cheap Drones Stress Expensive Defences
The basic imbalance is straightforward. Modern air-defence missiles are designed to defeat difficult targets under demanding conditions. They therefore require sophisticated seekers, propulsion systems, guidance electronics, and production chains. One-way attack drones, by contrast, can often be manufactured in large numbers at much lower cost.
The problem is not merely financial. A missile fired today cannot be fired tomorrow. Production lines require time to replenish stocks, and wartime consumption can outpace manufacturing capacity. As a result, commanders increasingly view interceptor inventories as strategic assets rather than expendable supplies. [CSIS]csis.orgdepleting missile defense interceptor inventoryThe Depleting Missile Defense Interceptor InventoryDec 5, 2025 — Similarly, the Navy has learned a great deal from its engagements in…
Russia’s long-running Shahed campaign against Ukraine illustrates the point. The campaign has evolved toward persistent, large-scale drone raids intended to saturate defensive networks. According to CSIS, Russia significantly increased the volume of Shahed attacks, using inexpensive drones to pressure Ukrainian air defences and create a continuing demand for interception resources. [CSIS]csis.orgdrone saturation russias shahed campaignDrone Saturation: Russia's Shahed Campaign13 May 2025 — Russia's drone campaign utilizes inexpensive Shahed drones to saturate Ukrain…
The scale of these attacks has continued to grow. Independent analysis of Ukrainian Air Force data found that Russia launched more than 8,000 Shahed-type drones in May 2026 alone, with average daily launch rates exceeding 250 UAVs. Such numbers matter because even highly capable air-defence systems face strain when forced to engage threats night after night. [ISIS]isis-online.orgmonthly analysis of russian shahed 136 deployment against ukraineISISMonthly Analysis of Russian Shahed 136 Deployment…2 Jun 2026 — Russia launched a total of 8,161 Shahed-type UAVs an estimated 5,18…
What Salvo Competition Means for Magazines
Air-defence planners often think in terms of magazine depth: how many interceptors are available before a battery, ship, or defended region requires resupply.
Saturation attacks exploit that limitation. The attacker does not necessarily need every drone to survive. Instead, the objective may be to create competition for defensive resources:
- Force missile batteries to engage numerous low-end targets.
- Increase the probability that some attackers leak through.
- Reduce interceptor availability for later strikes.
- Create uncertainty about what follows the initial wave.
This dynamic is sometimes called salvo competition. Offensive systems compete against defensive magazines. The side that can sustain operations longer gains an advantage.
Red Sea operations demonstrated how quickly this pressure can emerge. Defending forces repeatedly used sophisticated interceptors against incoming drones and missiles, leading analysts to examine whether existing stockpiles and production rates could support prolonged campaigns. CSIS and other defence analysts have highlighted growing concern over interceptor consumption and the need for larger inventories or cheaper defensive layers. [CSIS+2CSIS]csis.orgCost and Value in Air and Missile Defense Intercepts13 Feb 2024 — Multiple media outlets have, for instance, highlighted the U.S…
Importantly, the issue is not simply that a missile may cost more than a drone. Defence analysts frequently caution that the value protected by an interceptor—a ship, city, airbase, or critical infrastructure facility—can justify expensive engagements. The real challenge is that every successful interception still consumes a finite round from a limited magazine. [CSIS+2JAPCC]csis.orgCost and Value in Air and Missile Defense Intercepts13 Feb 2024 — Multiple media outlets have, for instance, highlighted the U.S…
How Drone Raids Create Openings for Higher-Risk Threats
The most worrying saturation scenarios involve mixed attack packages rather than drone-only raids.
In a layered strike, drones may arrive first to trigger radar activity, consume interceptor stocks, reveal defensive positions, and occupy command-and-control systems. More capable weapons can then follow. Even if the drones themselves cause limited damage, they may help create conditions for later attacks.
This is why missile preservation has become a central planning concern. Air-defence commanders want confidence that high-end interceptors remain available when cruise missiles, ballistic missiles, or other difficult targets appear. If large drone raids repeatedly consume those interceptors, the defender’s ability to respond to subsequent threats declines. [CSIS+2CSIS]csis.orgdrone saturation russias shahed campaignDrone Saturation: Russia's Shahed Campaign13 May 2025 — Russia's drone campaign utilizes inexpensive Shahed drones to saturate Ukrain…
The issue becomes especially acute during long campaigns. Gulf states responding to missile and drone attacks in 2026 reportedly consumed substantial numbers of long-range interceptors in a relatively short period, illustrating how sustained operations can pressure inventories even among well-equipped defenders. [IISS]iiss.orgdefending the skies of the arab gulf statesDefending the skies of the Arab Gulf statesMar 18, 2026 — Since the beginning of the current war in Iran on 28 February, the Arab Gul…
How a Laser Layer Changes the Numbers
Directed-energy weapons are attractive in this context because they alter magazine economics.
A laser does not eliminate every air-defence problem. Weather, atmospheric conditions, line-of-sight limitations, target manoeuvres, and power generation constraints all affect performance. Yet against suitable drone targets, a laser engagement does not require launching a physical interceptor. As long as sufficient electrical power and thermal management are available, the system can continue engaging targets without drawing down missile stocks. National Defense Magazine+2The Times of India [nationaldefensemagazine.org]nationaldefensemagazine.orggovernment perspective directed energy in air base defense can save the arsenalNational Defense MagazineDirected Energy in Air Base Defense Can Save the Arsenal11 Aug 2025 — Directed energy weapons, including high-en…
From a saturation perspective, this changes the defensive calculation. Instead of asking whether a low-cost drone deserves an expensive missile, defenders gain another option. Small drones can be assigned to a laser layer while missile batteries remain focused on threats that require kinetic interception.
The effect is cumulative rather than dramatic. A laser that destroys even a fraction of incoming drones reduces pressure on missile magazines. Across repeated raids, preserving dozens or hundreds of interceptor rounds may matter more than any single engagement. This inventory-preservation function explains why many military discussions of directed-energy weapons focus on counter-drone missions rather than on replacing traditional missile defences outright. [National Defense Magazine+2National Defense Magazine]nationaldefensemagazine.orggovernment perspective directed energy in air base defense can save the arsenalNational Defense MagazineDirected Energy in Air Base Defense Can Save the Arsenal11 Aug 2025 — Directed energy weapons, including high-en…
The Strategic Importance of Preserving Missiles
The long-term significance of drone saturation attacks lies in what they reveal about modern air warfare. Attackers increasingly exploit quantity, persistence, and affordability to pressure defensive systems. Defenders, meanwhile, must manage not only immediate threats but also the endurance of their missile inventories.
In that contest, the central question is often not whether a drone can be shot down. It is whether the defender can continue shooting down drones after weeks or months of sustained attacks. Saturation campaigns seek to turn air defence into a stockpile problem. Directed-energy weapons are being pursued because they offer a way to reduce that pressure, allowing missiles to remain in reserve for the threats that truly demand them. [National Defense Magazine+3CSIS+3CSIS]csis.orgdrone saturation russias shahed campaignDrone Saturation: Russia's Shahed Campaign13 May 2025 — Russia's drone campaign utilizes inexpensive Shahed drones to saturate Ukrain…
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Endnotes
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Source: csis.org
Title: drone saturation russias shahed campaign
Link: https://www.csis.org/analysis/drone-saturation-russias-shahed-campaignSource snippet
Drone Saturation: Russia's Shahed Campaign13 May 2025 — Russia's drone campaign utilizes inexpensive Shahed drones to saturate Ukrain...
Published: May 2025
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Source: csis.org
Title: depleting missile defense interceptor inventory
Link: https://www.csis.org/analysis/depleting-missile-defense-interceptor-inventorySource snippet
The Depleting Missile Defense Interceptor InventoryDec 5, 2025 — Similarly, the Navy has learned a great deal from its engagements in...
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Source: isis-online.org
Title: monthly analysis of russian shahed 136 [deployment]({{ ‘deployment/’ | relative_url }}) against ukraine
Link: https://isis-online.org/isis-reports/monthly-analysis-of-russian-shahed-136-deployment-against-ukraineSource snippet
ISISMonthly Analysis of Russian Shahed 136 Deployment...2 Jun 2026 — Russia launched a total of 8,161 Shahed-type UAVs an estimated 5,18...
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Source: csis.org
Link: https://www.csis.org/analysis/cost-and-value-air-and-missile-defense-interceptsSource snippet
Cost and Value in Air and Missile Defense Intercepts13 Feb 2024 — Multiple media outlets have, for instance, highlighted the U.S...
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Source: japcc.org
Title: calculating the true value of air defence
Link: https://www.japcc.org/online-feature/calculating-the-true-value-of-air-defence/Source snippet
13 Dec 2024 — It's not about the cost of a missile against a drone, but the value of the ships that survive and keeping sea-lanes open...
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Source: defense.info
Title: From Red Sea Defense to Epic Fury: How the U.S
Link: https://defense.info/re-shaping-defense-security/2026/03/from-red-sea-defense-to-epic-fury-how-the-u-s-flipped-the-drone-cost-equation/Source snippet
Flipped...9 Mar 2026 — The problems were interlocking. Interceptors costing in the low-to-mid millions per shot were routinely being use...
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Source: iiss.org
Title: defending the skies of the arab gulf states
Link: https://www.iiss.org/online-analysis/online-analysis/2026/03/defending-the-skies-of-the-arab-gulf-states/Source snippet
Defending the skies of the Arab Gulf statesMar 18, 2026 — Since the beginning of the current war in Iran on 28 February, the Arab Gul...
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Source: csis.org
Title: unpacking irans drone campaign gulf early lessons future drone warfare
Link: https://www.csis.org/analysis/unpacking-irans-drone-campaign-gulf-early-lessons-future-drone-warfareSource snippet
Unpacking Iran's Drone Campaign in the Gulf10 Mar 2026 — Ukraine's success stems from integrating interceptor drones into a layered defen...
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Source: csis.org
Link: https://www.csis.org/analysis/37-billion-estimated-cost-epic-furys-first-100-hoursSource snippet
$3.7 Billion: Estimated Cost of Epic Fury's First 100 HoursMar 5, 2026 — The first 100 hours (H) of the operation are estimated to cost $...
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Source: nationaldefensemagazine.org
Title: government perspective directed energy in air base defense can save the arsenal
Link: https://www.nationaldefensemagazine.org/articles/2025/8/11/government-perspective-directed-energy-in-air-base-defense-can-save-the-arsenalSource snippet
National Defense MagazineDirected Energy in Air Base Defense Can Save the Arsenal11 Aug 2025 — Directed energy weapons, including high-en...
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Source: timesofindia.indiatimes.com
Link: https://timesofindia.indiatimes.com/defence/news/silent-cheap-deadly-why-[lasersSource snippet
These directed-energy weapons (DEWs) are capable of neutralizing threats such as drones, missiles, and aircraft with high precision and n...
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Source: nationaldefensemagazine.org
Title: counterdrone mission seen as killer app for directed energy
Link: https://www.nationaldefensemagazine.org/articles/2026/1/20/counterdrone-mission-seen-as-killer-app-for-directed-energySource snippet
Counter-UAS Mission Seen as Killer App for Directed EnergyJan 20, 2026 — High-powered microwaves can blast more energy at a drone or dron...
Additional References
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Source: csis-website-prod.s3.amazonaws.com
Link: https://csis-website-prod.s3.amazonaws.com/s3fs-public/2025-05/250513_Jensen_Drone_Saturations.pdf?VersionId=QsQBXrKcuEpHw4yK0EoTr7ZIraS5yTMWSource snippet
Drone SaturationEven if the low-cost attack drones are easy to intercept, they force the defender to spend limited defense resources to i...
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Source: missiledefenseadvocacy.org
Link: https://www.missiledefenseadvocacy.org/missile-defense-systems/missile-interceptors-by-cost/Source snippet
Missile Interceptors by CostThis list compares the cost of different missile defense system interceptors per missile intercept. Next Gene...
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Source: rand.org
Link: https://www.rand.org/Source snippet
RAND Provides Objective Research Services and Public...RAND is a research organization that develops solutions to public policy challeng...
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Source: rand.edu
Link: https://www.rand.edu/Source snippet
RAND School of Public Policy: Public Policy Graduate...Embedded in a renowned research institution, RAND School graduate programs includ...
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Source: rand.com
Link: https://www.rand.com/Source snippet
Rand Worldwide: [Engineering]({{ 'engineering/' | relative_url }}) Technology and ServicesRand Worldwide is a leading provider of technology solutions and professional services...
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Source: papers.ssrn.com
Link: https://papers.ssrn.com/sol3/Delivery.cfm/6375919.pdf?abstractid=6375919&mirid=1Source snippet
quantitative analysis of low-cost drone warfareThis dissertation investigates the economics of asymmetric attrition through a quantitativ...
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Source: en.cppreference.com
Link: https://en.cppreference.com/c/numeric/random/randSource snippet
a pseudo-random integer value between 0 and RAND_MAX (0 and RAND_MAX included). srand seeds the pseudo-random number generator used by...
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Source: linkedin.com
Link: https://www.linkedin.com/posts/keith-king-03a172128_directed-energy-weapons-are-moving-from-prototype-activity-7459943070164242432-4KLWSource snippet
Directed-Energy Weapons Transition to Mass Deployment12 May 2026 — It won't take long for others to figure out to give their drones and m...
Published: May 2026
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Source: x.com
Link: https://x.com/CSIS/status/1923007986244411501Source snippet
X (formerly Twitter)Drone Saturation: Russia's Shahed Campaign | CSISRussia significantly ramped up its use of Shahed drones, increasing...
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Source: missiledefenseadvocacy.org
Link: https://www.missiledefenseadvocacy.org/tag/costs/
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