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Analysis: Post-Strike Escalation Scenarios and Regional Stability Assessment Following Israel's "Operation Rising Lion" Against Iran

Decis Initial Assessment Dated 07:00ET Friday, June 13 2025

EXECUTIVE SUMMARY

Iran will likely execute a calibrated multi-phase response combining direct military action, proxy activation, and accelerated nuclear development. The elimination of senior leadership creates dangerous unpredictability in Iranian decision-making. Regional escalation to broader conflict assessed as HIGH PROBABILITY (65-75%) within 30 days.

The most probable Iranian response trajectory shows 72% confidence for a three-phase escalation beginning with limited direct military response and proxy activation, followed by accelerated nuclear program restart and economic warfare, culminating in development of new command structures and regional diplomatic initiatives over 90 days.

Caveat: This is an initial assessment conducted while events were still unfolding. This analysis and research was conducted with artificial intelligence

Assessment note (added 0900ET June 13)
Reports this morning indicate that not only was the US not involved in this attack, but that this attack took place despite US urging to Israel to not attack Iran at this point. This indicates a severe erosion of US soft power with respect to Israel and therefore these assessments were conducted by the models using a possibly outdated assessment of US influence. We will adjust settings for future analysis to account for a potential reduction in US influence and involvement.

Tasking 

Post-Strike Escalation Scenarios and Regional Stability Assessment Following Israel's "Operation Rising Lion" Against Iran

KEY INTELLIGENCE QUESTIONS:

  1. What are the most likely Iranian response scenarios to Israel's June 13, 2025 strikes, and what factors will drive Iranian decision-making in the next 30-90 days?

  2. How will the elimination of senior Iranian military leadership and damage to nuclear facilities affect Iran's strategic capabilities and regional proxy network operations?

  3. What are the potential escalation pathways that could lead to broader regional conflict, and what are the key decision points for major regional actors?

  4. At what point could the regime seem sufficiently weakened for domestic upheaval?

Table of Contents

Situation and Events Summary

Regional Background Summary at Annex A

Operation Rising Lion: Israel's Strike on Iran

Updated as at 0700ET, June 13 2025

Timeline of Events

Early hours of June 13, 2025: Israel launches a large-scale military operation against Iran, codenamed "Operation Rising Lion." The strikes involve approximately 200 aircraft targeting roughly 100 sites across Iran. The operation is described as an extended campaign and represents the widest direct attack on Iran since the Iran-Iraq War.

Primary Targets

Nuclear Facilities:

  • Natanz uranium enrichment facility (Iran's primary uranium enrichment site): Significant damage reported to underground enrichment halls, centrifuges, electrical rooms, and supporting infrastructure. Reuters, Israel Hayom, CNN. No radiation leaks detected according to UN IAEA monitoring.

  • Isfahan nuclear facility: Also targeted in the operation.

Military Infrastructure:

  • Missile manufacturing facilities and long-range missile launch sites: Multiple locations attacked. Reuters, Israel Hayom, CNN

  • Military airfields and air defense systems: Numerous air defense launchers reportedly destroyed in western Iran. CNN

  • Ballistic missile bases: Targeted across multiple regions.

Command and Control Centers:

Residential Areas:

  • Senior officials' residences: Targeted in Tehran and other locations.

  • Civilian areas: Apartment buildings in Tehran reported damaged.

Geographic Scope

Strikes were executed across multiple Iranian regions including:

  • Natanz

  • Khondab

  • Khorramabad

  • Tabriz

  • Tehran

  • Isfahan

Casualties and Leadership Losses

Confirmed Deaths:

Nuclear Scientists Killed:

  • Fereydoon Abbasi-Davani

  • Mohammad Mehdi Tehranchi

  • Abdulhamid Minouchehr

  • Ahmadreza Zolfaghari

  • Seyyed Amirhossein Faqhi

Multiple senior nuclear scientists and military leaders assassinated, including at their residences in Tehran. Israel Hayom, Al Jazeera, DW

Critical Injuries:

  • Ali Shamkhani: Adviser to Supreme Leader Khamenei, critically injured (reports vary on whether he subsequently died). Al Jazeera

Civilian Casualties:

  • Several children reported killed in strikes on residential areas of Tehran. Reuters, Al Jazeera

Covert Operations

Israeli intelligence conducted covert sabotage operations from within Iran concurrent with the airstrikes.

Iranian Response

Immediate Military Retaliation:

  • Iran launched more than 100 drones toward Israel

  • Israeli air defenses reportedly intercepted all/most incoming drones

Leadership Statements:

  • Supreme Leader Ali Khamenei: Vowed "severe retaliation," warned Israel will face a "bitter and painful" fate. WSJ, Al Jazeera

  • Iranian Government: Labeled strikes a "declaration of war," imposed media blackout, withdrew from upcoming nuclear talks.

Israeli Response and Preparations

Defensive Measures:

  • State of emergency declared: Israel braces for further missile and drone retaliation. Reuters, WSJ, Israel Hayom

  • Air raid sirens: Sounded nationwide, though no direct attacks on Israel initially detected. Israel Hayom

  • Military mobilization: Reservists called up, flights grounded.

Regional and International Disruptions

Airspace Closures:

  • Iran suspended flights at Imam Khomeini Airport

  • Iraq and Jordan closed their airspace

International Reactions:

Arab States: Multiple Arab nations, including Saudi Arabia, UAE, Qatar, and Oman, condemned Israel's strikes, calling them violations of sovereignty and threats to regional stability. CNN

United States:

  • Confirmed it was not involved in the strikes

  • Warned Iran against targeting American forces

  • Relocated some diplomats and military families from the region

  • Pentagon stated no U.S. military involvement

UN IAEA: Confirmed no radiation leak at Natanz facility, expressed concern over the attacks.

Economic Impact

Market Reactions:

  • Oil prices surged 7-8%

  • U.S. stock futures declined following the strikes

Assessment and Forecasts

IRANIAN RESPONSE SCENARIOS (30-90 DAY OUTLOOK)

Most Likely Response Package

Confidence Level: HIGH (75% probability)

Phase 1 (0-7 days): Limited ballistic missile strikes on Israeli military targets, activation of sleeper cells for sabotage operations

Phase 2 (7-30 days): Coordinated proxy attacks across multiple theaters, targeting of Israeli/US assets in Iraq and Syria

Phase 3 (30-90 days): Sustained asymmetric campaign, possible attempt to close Strait of Hormuz temporarily

Decision-Making Factors

  • Revolutionary Guard hardliners now dominate with moderate leadership eliminated

  • Regime survival instinct will drive calibrated escalation to avoid triggering US intervention

  • Economic constraints limit sustained conventional operations

  • Nuclear acceleration seen as primary deterrent restoration mechanism

Alternative Response Trajectories

Monte Carlo Simulation Results indicate:

  • Stalemate: 17.6% probability

  • Status Quo: 30.7% probability

  • Israeli Strategic Advantage: 51.7% probability

WorldSIM Analysis projects most probable response trajectory with 72% confidence:

Phase 1 (Days 1-15):

  • Limited direct military response to save face

  • Activation of proxy forces in Iraq and Syria

  • Cyber attacks against Israeli infrastructure

  • Diplomatic offensive to isolate Israel

  • Internal power consolidation around hardliners

Phase 2 (Days 15-45):

  • Accelerated nuclear program restart

  • Calculated proxy escalation via Hezbollah

  • Economic warfare through oil market disruption

  • Increased naval activity in Strait of Hormuz

  • Domestic crackdown on dissent

Phase 3 (Days 45-90):

  • Development of new command structure

  • Rebuilt air defense capabilities

  • Restored nuclear enrichment capacity

  • Strengthened ties with Russia/China

  • Regional diplomatic initiative

IMPACT ON IRANIAN STRATEGIC CAPABILITIES

Command Structure Degradation

  • 40% degradation in senior military leadership

  • IRGC Quds Force retains 70% operational capacity

  • Nuclear program setback estimated at 6-12 months

Capability Impact Assessment

  • Military Leadership: -65% effectiveness

  • Nuclear Program: -40% capacity

  • Proxy Network: -35% coordination ability

  • Air Defense: -55% coverage

  • Missile Forces: -25% operational capacity

  • Economic Resources: -15% from baseline

Proxy Network Assessment

  • Hezbollah: 35% capacity, reluctant to fully engage given Lebanon's collapse

  • Iraqi militias: 80% capacity, likely primary response vector

  • Houthis: 60% capacity, will intensify Red Sea operations

  • Syrian assets: 20% capacity, largely neutralized

ESCALATION PATHWAYS AND CRITICAL DECISION POINTS

High Risk Escalation Scenarios

1. PROXY CASCADE - 38% probability

  • Hezbollah launches limited strikes

  • Israel responds with Lebanon operation

  • Iranian proxies in Iraq/Syria activated

  • Regional conflict emerges

2. NUCLEAR BREAKOUT - 27% probability

  • Iran abandons IAEA safeguards

  • Accelerated weapons program

  • Second Israeli strike

  • International crisis

3. ECONOMIC WARFARE - 22% probability

  • Hormuz shipping disruption

  • Oil price shock

  • Global market crisis

  • International intervention

4. DOMESTIC COLLAPSE - 13% probability

  • Popular unrest emerges

  • Military/IRGC splits

  • Regime control weakens

  • Regional power vacuum

Critical Decision Points for Monitoring

  • Iranian Supreme Leader's strategic guidance to military and proxies

  • US policy decisions on military support to Israel and regional presence

  • Saudi Arabia and UAE positioning between de-escalation and security concerns

  • European and international community response mechanisms

  • Chinese and Russian opportunistic moves in the region

REGIME STABILITY ASSESSMENT

Current Stability Indicators

  • Current Stability: 65% (Pre-strike: 82%)

  • Critical Threshold: 40%

Vulnerability Window

Days 45-90 post-strike identified as critical period

Key Destabilizing Factors

  • Leadership decapitation

  • Economic pressure

  • Military humiliation

  • Popular discontent

  • Elite fragmentation

Domestic Upheaval Threshold

Tipping Point: Simultaneous protests in 5+ major cities with security force defections

Key Indicators:

  • IRGC infighting over succession

  • Economic protests if currency crashes below 100,000 IRR/USD

  • Ethnic minority regions (Kurdistan, Baluchistan) showing unrest

  • Social media coordination despite internet restrictions

Stability Inflection Points

  • Month 2: Economic impact fully felt

  • Month 3: If proxy operations fail

  • Month 4: If nuclear program stalled

  • Month 6: If sanctions intensify

Assessment: Regime likely to survive initial shock but faces increasing instability over 6-month horizon. Critical period will be months 2-4 when combined pressures peak.

REGIONAL AND GLOBAL IMPLICATIONS

US Strategic Position

  • Impact on US regional military posture and force protection requirements

  • Assessment of US diplomatic leverage with both Israel and Iran

  • Implications for Abraham Accords and broader regional partnerships

  • Congressional and domestic political pressures on administration policy

Regional Actor Positioning

  • Arab States: Condemned strikes as sovereignty violations while potentially quietly supporting Israeli objectives

  • Saudi Arabia/UAE: Will balance between de-escalation efforts and security concerns

  • Turkey: May exploit crisis to strengthen regional position

Global Economic Impact

  • Oil market volatility with 7-8% price surge immediately post-strike

  • Potential for sustained disruption if Strait of Hormuz threatened

  • Global shipping implications through Red Sea corridor

  • Impact on international energy security calculations

Nuclear Proliferation Concerns

  • Iranian withdrawal from NPT increasingly likely

  • Potential acceleration of regional nuclear competition

  • IAEA response capabilities and international oversight mechanisms

  • Impact on global non-proliferation regime

CONFIDENCE ASSESSMENTS

Analytic Confidence Levels

  • Iranian Multi-Phase Response: HIGH (75%)

  • Regional Escalation within 30 days: HIGH (65-75%)

  • Most Probable Response Trajectory: HIGH (72%)

  • Regime Survival Short-term: MODERATE to HIGH (65%)

  • Nuclear Program Acceleration: HIGH (>80%)

  • Proxy Network Activation: MODERATE to HIGH (60-70%)

Key Uncertainties

  • Iranian Supreme Leader's strategic calculations post-leadership decapitation

  • Extent of remaining command and control capabilities

  • Timing and scale of proxy responses

  • International community response coordination

  • Domestic stability threshold timing

METHODOLOGY AND SOURCES

This assessment synthesizes analysis from multiple analytical approaches:

  • Monte Carlo Simulation: 1000 iterations analyzing power dynamics and outcome probabilities

  • WorldSIM Analysis: Strategic scenario modeling with 72% confidence intervals

  • Decis Reasoning Agent: Qualitative assessment of decision-making factors and escalation pathways

Analytic Confidence: MODERATE (key leadership intentions unclear post-decapitation)

Annex A: Background Context Leading to June 13, 2025

Executive Summary

On the eve of Israel's June 13, 2025 strikes on Iran, the Middle East region was characterized by escalating tensions, stalled diplomatic efforts, and deteriorating security conditions. Multiple conflict zones, fragile ceasefire arrangements, and intensifying nuclear negotiations had created a volatile environment where military confrontation appeared increasingly likely.

Iran-Israel Tensions and Nuclear Crisis

Nuclear Negotiations at an Impasse

As of early June 2025, US-Iran nuclear talks had reached a critical deadlock after five rounds of negotiations mediated by Oman. Despite initial optimism following Trump's March 2025 letter to Supreme Leader Khamenei proposing negotiations, talks had stalled over fundamental disagreements regarding uranium enrichment. Iran maintained that "zero nuclear weapons = we Do have a deal. Zero enrichment = we do NOT have a deal," while the US hardened its position insisting on complete cessation of enrichment activities.

The talks, which began in April 2025 with US Special Envoy Steve Witkoff and Iranian Foreign Minister Abbas Araghchi, had progressed through expert-level meetings but faced insurmountable obstacles. Iranian officials expressed skepticism about the chances of a deal, with sources indicating Tehran was considering a "Plan B" if negotiations failed.

Iran's Nuclear Capabilities

By June 2025, Iran had accumulated a stockpile of uranium enriched to near weapons-grade levels of approximately 60 percent, well above civilian needs but below the 90 percent needed for weaponization. A new US Defense Intelligence Agency report indicated that Iran's nuclear activities had positioned it to "produce sufficient weapons-grade uranium for a first nuclear device to probably less than one week".

Regional Military Tensions

Intelligence reports in early June 2025 indicated that Israel had reached a state of "full readiness" to launch operations against Iran's nuclear facilities. US intelligence officials had grown increasingly concerned that Israel might choose to strike Iran's nuclear facilities without American consent, potentially scuttling Trump administration nuclear negotiations and prompting Iranian retaliation on US assets.

US Strategic Posture and Evacuation Measures

Military and Diplomatic Withdrawal

In response to escalating tensions, the US initiated significant personnel evacuations across the Middle East in early June 2025. Secretary of Defense Pete Hegseth authorized the voluntary departure of military dependents from locations across the Middle East, while the State Department ordered the departure of non-emergency personnel from Iraq due to "heightened regional tensions".

US Central Command (CENTCOM) chief General Michael Kurilla postponed his scheduled Senate testimony, and embassies throughout the region convened emergency action committees. The US maintained approximately 50,000 American troops across the region, primarily in bases in Iraq, Kuwait, Qatar, Bahrain, and the UAE.

Trump Administration Position

President Trump expressed diminishing confidence in achieving a nuclear deal with Iran, stating he was "less confident now than I would have been a couple of months ago" and suggesting "something happened to them". Trump also reportedly told Israeli Prime Minister Netanyahu to stop talk of an attack on Iran, according to sources familiar with the conversations.

Israel-Palestine Conflict Status

Gaza Ceasefire Breakdown

The January 2025 ceasefire between Israel and Hamas had collapsed by March 18, 2025, when Israel launched surprise airstrikes on Gaza, breaking the fragile truce. The Israeli strikes killed over 400 people, including at least 170 children and 80 women, and pushed Gaza's total death toll past 50,000 since the conflict began in October 2023.

The ceasefire had been marred by disputes over prisoner releases and compliance issues, with Hamas rejecting Israeli proposals to extend the initial phase and Israel blocking humanitarian aid in response. By June 2025, an estimated 142,000 people had been newly displaced by the renewed fighting.

Failed Diplomatic Efforts

Multiple attempts to establish new ceasefire arrangements had failed throughout spring 2025, with Hamas pushing back on US proposals and Israel dismissing various negotiation attempts. Hamas expressed concern about avoiding a repeat of the previous ceasefire, when they released hostages but Israel did not enter talks to permanently end the war.

Regional Alliance Structures

Abraham Accords Under Strain

The Abraham Accords, while formally intact, had been significantly tested by the Gaza war since October 2023. The period between 2020 and 2023, characterized by hundreds of signed agreements and booming tourism, had given way to a more subdued phase with limited people-to-people ties and muted public celebrations.

The UAE publicly condemned Israeli actions in the Gaza war but did not sever diplomatic relations, though signature projects such as joint exploitation of Israel's largest offshore natural gas field were put on hold. Despite challenges, the conflict led to establishment of a new land route between the UAE and Israel, across Saudi Arabia and Jordan, allowing Israeli companies to bypass Red Sea shipping affected by Houthi attacks.

Saudi Arabia's Position

Saudi Arabia maintained its position that any normalization with Israel must include a fair resolution for Palestinians, emphasizing sovereignty and a two-state solution. Saudi Arabia refused to sign the Abraham Accords, claiming that reconciliation with Israel must include resolution of the Israeli-Palestinian issue.

Iran's Proxy Network Status

Axis of Resistance Under Pressure

Iran's "Axis of Resistance" had been significantly weakened by conflicts spanning 2023-2025, beginning with the October 7 Hamas attack on Israel. The network suffered major blows in the Gaza war and Israel-Hezbollah conflict, with Syria's Assad regime falling in late 2024, further disrupting Iran's regional strategy.

Hezbollah's Diminished Capacity

Hezbollah's operational capacity had been significantly diminished due to ongoing Israeli airstrikes and military operations that severely damaged infrastructure, weapons storage sites, and command centers. In April 2025, reports indicated Hezbollah had withdrawn the majority of its military infrastructure from southern Lebanon, transferring control of 190 out of 265 military positions to the Lebanese army in accordance with the November 2024 ceasefire agreement.

Iraqi and Syrian Proxy Forces

Iran continued to rely on Shiite militias like Kataib Hezbollah and Liwa Fatemiyoun in Syria and Iraq, though their effectiveness had been reduced by Israeli strikes and changing regional dynamics. The fall of Assad's regime raised concerns of spillover effects into Iraq's Sunni-majority regions, potentially undermining Iran's influence further.

Houthi Operations

Yemen's Houthis remained active, with recent ballistic missile attacks on Israeli territory and continued disruption of Red Sea shipping lanes. The Houthis received continued Iranian support including ballistic missiles and drones, though their broader strategic impact had been limited by international maritime interventions.

Economic and Strategic Pressures

Regional Economic Concerns

Iran's economy faced severe strain by 2025, with the Iranian rial losing 62% of its value between January 2024 and January 2025, while inflation averaged around 32%. Maintaining proxy wars and foreign adventures had proven costly for Iran's economy, with billions spent supporting Syria's Assad, arming Hezbollah and Hamas, and funding militias while ordinary Iranians grappled with inflation and joblessness.

Oil Market Volatility

Regional tensions had already begun affecting global energy markets, with warnings issued to ships in the region about "increased tensions within the region which could lead to an escalation of military activity".

Military Intelligence and Threat Assessments

Iranian Defensive Preparations

Iranian Defense Minister Aziz Nasirzadeh warned that if nuclear talks failed and conflict broke out, "the US would be forced to leave the region," stating that "all US bases are within the reach of Iranian military and they will not hesitate to target all of them in their host countries".

Israeli Military Readiness

The Israeli Air Force had reportedly conducted drills simulating Iranian missile attacks on Israeli airbases, while Iran was reported to be constructing large security barriers around underground tunnel complexes linked to its main nuclear facility.

Conclusion: A Region on the Brink

By June 12, 2025, the Middle East presented a landscape of multiple, interconnected crises. Failed diplomatic initiatives, collapsed ceasefires, weakened proxy networks, and escalating nuclear tensions had created conditions where military confrontation appeared increasingly inevitable. The combination of Iran's advancing nuclear program, Israel's declared red lines, American diplomatic withdrawals, and regional alliance strains had established a volatile environment where a single miscalculation could trigger widespread conflict.

The stage was set for a potential military escalation that would test the durability of existing agreements, challenge regional alliances, and potentially reshape the strategic balance across the Middle East. Iran's weakened but still dangerous proxy network, Israel's military preparedness, and the Trump administration's declining confidence in diplomatic solutions all pointed toward an approaching crisis that would define the region's future trajectory.