Can the U.S. Secure Iran’s Oil Lifeline? A Structured Cost‑Benefit Analysis of Seizing Harlek Island

Harlek Island, a less‑than‑20 km² island about 25 km off Iran’s coast, handles roughly 90‑96% of Iran’s crude exports, making it a critical node in the global energy supply chain. The United States has conducted airstrikes while deliberately preserving oil infrastructure, signaling a possible ground operation as a negotiation lever.

Structural Cost Analysis

The article does not aim for precise probabilities but proposes a qualitative‑semi‑quantitative framework to evaluate how key variables influence operational success and strategic benefit.

Landing Phase: Attrition Coefficient and Force Reduction

An exponential decay model is used to describe force loss during the sea‑crossing and beach‑capture stages: N(t) = N_0 \times e^{-k t} where N_0 is the initial effective force, N(t) the remaining combat power after crossing time t , and k the attrition‑rate coefficient. The model assumes continuous, uniform loss, which simplifies reality where losses are often discrete (mines, missile salvos, drone swarms). Factors that raise k on Harlek Island include:

Proximity to Iran (≈25 km) places the island within the range of short‑range missiles, shore‑based artillery, and UAVs.

Iran is estimated to possess 2,000–6,000 naval mines that could be laid in the landing corridor, dramatically slowing and exposing the crossing.

The Iranian Revolutionary Guard Navy’s fast attack craft can conduct asymmetric harassment.

Consequently, the force‑arrival rate is expected to be significantly lower than in conventional amphibious assaults.

Engagement Phase: Lanchester Linear Law

The linear form of the Lanchester equation is adopted to model force consumption during the formal combat phase, justified by Iran’s reliance on asymmetric weapons (missiles, drones, mines) that produce a roughly constant kill rate per unit rather than the quadratic law suited to symmetric fire‑to‑fire engagements.

Holding Phase: Strategic Net‑Benefit Function and Cost Inflation

The strategic net benefit is defined as:

NetBenefit = P_control × V_island – C_military(t) – C_political – C_other

Key components:

P_control : probability of successfully controlling the island (depends on landing outcome).

V_island : strategic value of an intact island, primarily the ability to cut off >90% of Iran’s oil exports.

P_facilities : probability that oil facilities remain intact; if Iran destroys its own facilities, strategic value drops to near zero.

C_military(t) : cumulative military cost over time, composed of a one‑time landing cost plus a continuous consumption rate.

C_political : domestic political cost and international isolation.

Because the island stays within Iranian missile range, the ongoing consumption rate does not diminish over time; the holding cost therefore grows linearly without convergence.

Public‑opinion data from Reuters and Ipsos show that about 59% of Americans oppose military action against Iran, with only ~7% supporting a ground deployment, which caps the political feasibility of escalation.

Key Judgments

First : The seizure plan currently serves as a bargaining chip rather than a definitive objective; a ground operation would trap the U.S. in a costly hold‑or‑withdraw dilemma.

Second : Iran’s resilience exceeds early expectations; the war has not sparked large‑scale domestic unrest, and the new leadership maintains policy continuity, weakening the assumption that military pressure will topple the regime.

Third : The conflict is likely to become a protracted drain rather than a swift victory, with both sides incurring sunk costs.

Fourth : Ongoing negotiations (recent talks in Pakistan) constitute the most critical variable; progress could ease pressure on Harlek Island, while a breakdown would raise the probability of a ground assault.

Mismatch Between Strategic Goal and Means

The United States appears to face a strategic‑means mismatch: the original premise that a devastating strike would force Iran’s political collapse assumes a level of internal fragility not present. Iran’s strong ideological mobilization, decentralized power structure, and mature asymmetric defenses differ markedly from the 2003 Iraq scenario.

When air strikes fail to deliver a rapid victory, ground action emerges as an alternative, yet the new problems it creates may far outweigh the issues it aims to solve. The 25 km water gap to Harlek Island may be the hardest crossing for U.S. forces in the Persian Gulf.

Data sources: Observer, Xinhua, 21st Century Business Herald, Reuters/Ipsos polls. The mathematical model is a simplified analytical framework; parameters are not empirically calibrated and do not constitute a precise military assessment.