The sustainability of the preliminary US-Iran memorandum of understanding hinges entirely on an unhedged structural contradiction: Iran defines the agreement as a bilateral contract governing regional proxies, while Israel operates as an independent actor outside the treaty structure. Iranian Foreign Minister Abbas Araghchi’s declaration that a failure by Israel to withdraw from southern Lebanon constitutes a direct violation of the peace deal exposes the core mechanism of this failure. By binding a bilateral superpower accord to the tactical choices of a non-signatory third party, the framework creates a structurally unstable equilibrium.
This architecture ensures that any attempt to enforce the treaty will collapse under the weight of asymmetric incentives. The memorandum, scheduled for a formal signing on Friday in Switzerland, attempts to resolve a theater-wide war that escalated following the joint US-Israeli strikes on Iran. By analyzing the strategic calculus of the three core actors—Tehran, Jerusalem, and Washington—we can isolate the precise operational bottlenecks that make compliance mathematically improbable under the current terms.
The Tripartite Strategic Calculus
The primary breakdown in the memorandum occurs because the participating nations are optimizing for entirely different, mutually exclusive outcomes. The agreement lacks an integrated enforcement framework, leaving each actor to interpret compliance through the lens of its own national security requirements.
Iran: The Proxy-State Consolidation Function
Tehran’s diplomatic strategy is governed by a single operational principle: the preservation of its forward defense network. From the perspective of Iranian Grand Strategy, Hezbollah is not a distinct foreign entity; it is an organic extension of Iran’s deterrent architecture. Araghchi’s public briefing explicitly mapped this relationship by stating that the memorandum contains two unified blocs: the United States and Israel on one side, and Iran and Hezbollah on the other.
By structuring the definitions this way, Iran seeks to achieve two concrete objectives:
- Externalize Enforcement Costs: Tehran aims to hold Washington legally and diplomatically accountable for any tactical actions taken by the Israel Defense Forces (IDF) in southern Lebanon.
- Preserve Strategic Depth: By demanding an immediate and complete Israeli withdrawal as a prerequisite for a permanent end to the war, Iran seeks to restore the status quo ante. This allows Hezbollah to reoccupy its defensive positions south of the Litani River without disarming.
The structural limitation of this approach is that it assumes Washington possesses absolute leverage over Jerusalem. If the IDF maintains its positions, Iran faces a binary choice: accept a localized defeat of its primary proxy or void the memorandum, sacrificing the broader sanctions relief and the $300 billion reconstruction fund tied to the deal.
Israel: The Autonomous Security Zone Imperative
Israel is not a signatory to the US-Iran memorandum, a reality emphasized by Prime Minister Benjamin Netanyahu’s declaration that Israeli forces will remain in Lebanon, Syria, and Gaza "as long as necessary." The Israeli security establishment views the conflict through a localized, zero-sum framework rather than a global diplomatic one. The operational logic of the IDF is dictated by the physical removal of direct threats from its borders.
The creation of what Netanyahu termed "deep security zones" serves as a physical buffer designed to prevent a repetition of the cross-border rocket attacks launched by Hezbollah. Because Israel relies on the United States for critical munitions and diplomatic cover at the United Nations, it cannot openly sabotage Washington’s diplomatic initiatives. However, Jerusalem minimizes this constraint by separating its tactical military maneuvers from the broader US-Iran diplomatic channel.
This creates a severe structural bottleneck. The IDF will not voluntarily abandon territory won during the ground invasion without securing a verified, verifiable disarmament of Hezbollah—a condition that Iran cannot accept without dismantling its regional influence.
The United States: The Geopolitical De-escalation Priority
Washington’s primary objective is the systemic stabilization of global energy corridors, specifically the immediate and permanent reopening of the Strait of Hormuz. The US delegation, led by Vice President JD Vance, views the cessation of hostilities as a necessary first step toward a broader, secondary stage of negotiations designed to address Iran's nuclear program and the lifting of economic sanctions.
To secure the initial memorandum, US negotiators tolerated significant strategic ambiguity regarding the status of southern Lebanon. Anonymous US officials have acknowledged that the written text of the agreement does not explicitly mandate a unilateral Israeli military withdrawal. This omission allows the US to claim progress on the global stage while leaving the complex territorial realities of the Blue Line unresolved.
The weakness of this approach is its reliance on temporary tethers. By deferring the critical details of the Lebanese territorial dispute to secondary bilateral talks between Beirut and Jerusalem next week in Washington, the US has built an international peace framework on a foundation of unresolved border frictions.
The Operational Mechanics of Structural Friction
The divergent expectations of the parties manifest as specific operational vectors that threaten to trigger a resumption of all-out war. The core friction point is the physical overlap of Israeli military containment and Iranian defensive mandates in southern Lebanon.
[U.S.-IRAN MEMORANDUM]
│
▼ (Enforcement Obligation)
[UNITED STATES]
│
▼ (Asymmetric Leverage)
[ISRAEL] ───(Defiance)───► [Maintains Buffer Zones]
▲ │
│ ▼ (Tactical Friction)
(Armed Reprisal) [HEZBOLLAH]
│ ▲
│ │ (Strategic Command)
└─────────────────────── [IRAN]
This structural dynamic creates an escalation loop. If the IDF maintains its positions inside Lebanese territory, Hezbollah continues its localized insurgency under the banner of national resistance. When Hezbollah attacks advancing Israeli units, the IDF responds with heavy artillery and airstrikes. Under Araghchi’s framework, any subsequent Israeli military action is interpreted by Tehran as a direct violation of the memorandum by the United States, thereby legitimizing an Iranian retaliation, such as re-closing the Strait of Hormuz or resuming ballistic missile strikes.
The second operational friction point involves the sequence of the economic and nuclear benchmarks. The memorandum outlines a 60-day window following the initial signing to finalize terms regarding Iran’s nuclear program and the phased unfreezing of assets. However, because Iran treats the Lebanese theater as an inseparable component of the agreement, any tactical clash along the border can freeze the nuclear negotiations before they begin.
Territorial Realities and Boundary Conditions
The ongoing diplomatic impasse cannot be resolved through creative phrasing because it is rooted in physical geography. The unresolved status of the occupied zones in southern Lebanon directly impacts the security formulas of both regional powers.
- The Litani River Line: For Israel, a stable border requires a verified demilitarized zone extending from the international border to the Litani River. The presence of any armed state or non-state actors within this zone invalides the security guarantees required for the return of displaced civilians to northern Israel.
- The Sovereign Territorial Claim: For Lebanon and its backer, Iran, any permanent or semi-permanent Israeli military presence north of the Blue Line constitutes a de facto annexation. The Lebanese government, represented by President Joseph Aoun and Prime Minister Nawaf Salam, has aligned its diplomatic position with this reality, demanding a full withdrawal and the exclusive deployment of the Lebanese Armed Forces.
Because Hezbollah is excluded from the formal state-level negotiations occurring in Washington next week, the group retains absolute tactical veto power. It can initiate local engagements to deliberately test the durability of the US-Iran memorandum, forcing Tehran to either defend its proxy or lose credibility within the Axis of Resistance.
Strategic Forecast and Policy Recommendations
The current diplomatic architecture is unsustainable. If the memorandum is signed on Friday without an explicit, synchronized sequencing mechanism that addresses the physical presence of the IDF in Lebanon, the agreement will collapse within the first 30 days of implementation.
To prevent a rapid descent back into regional escalation, a fundamental restructuring of the enforcement mechanism is required. Washington must transition from an ambiguous bilateral framework to a multi-tiered, sequenced stabilization matrix.
First, the United States must establish a formal, indirect de-confliction channel between the IDF and the Lebanese Armed Forces, specifically mapping a phased, conditional withdrawal schedule. This withdrawal must be mathematically linked to the progressive verifiable dismantling of Hezbollah’s heavy rocket infrastructure south of the Litani River.
Second, the financial disbursements from the proposed $300 billion Iranian reconstruction fund must be structured as an incentive mechanism. Initial asset releases should be tied directly to maritime stability in the Strait of Hormuz, while subsequent tranches must be contingent on Tehran enforcing a strict cessation of offensive operations by its proxy networks in both Syria and Lebanon.
Without these concrete, verifiable benchmarks, Araghchi's statements are a precise warning: the memorandum is not a roadmap to peace, but a temporary operational pause before a larger, more destructive phase of the conflict.
