Iran's Promised Retaliation Against Israel: Understanding the Eerie Silence and What Comes Next

On July 31, 2024, Iran vowed fire and fury against Israel after the assassination of Hamas political leader Ismail Haniyeh in the Iranian capital of Tehran — a killing that occurred while Haniyeh was an honored guest during the inauguration of Iran’s new president, and shortly after a face-to-face meeting with Iran’s Supreme Leader. For nearly a year, Israel and Iran had been teetering on the knife’s edge of all-out war, and this event was widely regarded as the final straw. Iran’s Supreme Leader ordered a direct retaliatory strike against Israel within hours. Yet as of mid-August 2024, more than two weeks after the assassination, the skies over Israel remained quiet — an eerie, tension-laden silence that has left military analysts, diplomats, and the nations caught in the crossfire scrambling to understand what Iran is planning, when it will strike, and just how devastating the consequences could be.

How We Got Here: The Assassination of Ismail Haniyeh

The chain of events leading to this crisis is rooted in the long-standing enmity between Israel and Iran, the ongoing Israel-Hamas war that began after the events of October 7, 2023, and a series of escalatory strikes that brought both nations to the brink of open conflict. During the preceding ten months, Israel had gone to the precipice of war with multiple Iran-backed organizations, particularly Hezbollah in Lebanon, and Iran and Israel had even traded direct attacks on each other in April 2024, narrowly avoiding full-scale war.

The catalyst for the current crisis was the killing of Ismail Haniyeh, the political leader of Hamas and its lead negotiator in ongoing ceasefire efforts for Gaza. Haniyeh was killed in Tehran while staying as Iran’s honored guest during the inauguration of Iran’s new president, Masoud Pezeshkian, and shortly after meeting face-to-face with Iran’s Supreme Leader. The exact mechanism of his death remains uncertain — most Western sources point to a remotely detonated bomb smuggled months earlier into the guest house where Haniyeh was staying, while Iran claims he was killed by a short-range projectile. Israel has not claimed responsibility and likely will not for a very long time, but near-universal international consensus holds Israel responsible.

Key Takeaways

Iran’s Supreme Leader ordered a direct retaliatory strike against Israel following the assassination of Hamas leader Ismail Haniyeh in Tehran on July 31, 2024, yet more than two weeks later, no attack had materialized.
Israeli intelligence assessments as of mid-August indicated that a large-scale direct Iranian attack was expected within days, rather than a proxy strike or attack on an embassy abroad.
The United States took the rare step of publicly announcing the deployment of a guided-missile submarine and the repositioning of fighter aircraft and a carrier strike group toward the Middle East — moves designed to deter Iran.
Ceasefire talks between Israel and Hamas, scheduled for August 15, represented perhaps the last viable offramp from escalation, but Hamas announced it would not send a delegation in the talks’ current form.
Iran’s April 2024 attack on Israel, while calibrated to minimize casualties, revealed critical information about the limits of Israeli air defenses — intelligence that could inform a far more devastating follow-up assault.
The potential involvement of Hezbollah, with its arsenal of over 100,000 rockets and thousands of experienced fighters, could dramatically amplify the scale and lethality of any Iranian attack, potentially overwhelming Israel’s layered air defense systems entirely.

For Iran, the assassination was far more than a complication in peace talks. It was an absolutely unforgivable offense — a killing carried out on Iranian soil, targeting a guest of the state, during one of the most symbolically significant political events in the country’s recent history. Within hours, Iran’s Supreme Leader ordered a direct retaliatory strike against Israel. Then, Iran went dark, its leaders plotting behind closed doors while the rest of the world waited.

Israel’s Intelligence Assessment and Military Preparations

As of mid-August 2024, Israeli intelligence assessments suggested that Iran would attack within days. According to multiple unnamed intelligence sources speaking with foreign news outlets, Iran was expected to attack Israel directly — not through a proxy organization, not against an embassy abroad, but with a large-scale direct assault on Israeli territory. This represented a significant shift from earlier Israeli assessments, which had suggested Iran was still deciding on a method of attack and could potentially be pressured into minimizing its retaliation or backing down entirely. That window of ambiguity had closed.

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The specifics of Israel’s military preparations remained unclear, complicated by uncertainty about the exact nature of the coming attack. However, based on Israel’s past behavior around similar threats, several countermeasures were at least somewhat predictable: increased air patrols over Israeli skies, the pivoting and repositioning of troops not currently involved in the fighting in Gaza, and the preparation of options for either immediate counterattack or pre-emptive strike in the event that an imminent attack could be disrupted. On the public-facing side, Israel recalled soldiers traveling abroad on holiday and forbade career officers from leaving the country for the foreseeable future.

The American Response: Submarines, Carriers, and Deterrence Signals

The United States, Israel’s closest international ally, moved swiftly to reposition its own military assets in the region, sending unmistakable signals that it could become directly involved in any hostilities. The US Department of Defense took the rare step of publicly announcing the deployment of a guided-missile submarine to waters near the Middle East. The significance of this announcement lay not in the submarine’s presence — US submarines likely operate in those waters frequently — but in the fact that the United States chose to reveal its position publicly. This was almost certainly an intentional deterrence signal aimed directly at Tehran.

Beyond the submarine, fighter aircraft were shifted from US bases in Eurasia toward the Middle East, placing them within striking distance of a potential conflict. US Defense Secretary Lloyd Austin publicly urged an aircraft carrier, its onboard air wing of advanced stealth fighters, and its accompanying strike group to accelerate their ongoing voyage to waters off the Israeli coast. The subtext of that announcement was unmistakable: the United States believed an attack was imminent, expected it to be significant in scale, and wanted Iran to understand that American military power would be positioned to respond.

Iran’s Diplomatic Posture: No Longer Playing Vague

On the world stage, Iran abandoned any pretense of ambiguity about its intentions. Iran’s new president, Masoud Pezeshkian, allegedly told British Prime Minister Keir Starmer during a phone call on Monday, August 12, that retaliation against Israel was his country’s ‘legal right.’ When Britain, France, and Germany issued a joint appeal for restraint, Iran’s foreign ministry delivered a sharp public rebuke, stating that such demands were ‘void of political logic, in complete contradiction to the principles and rules of international law, and excessive.’

This diplomatic posture marked a significant departure from Iran’s historical pattern of bluster and ambiguity. The guardrails against open conflict — diplomatic pressure, international appeals, the threat of broader escalation — appeared to no longer be functioning as expected. The consensus among observers who understood the dynamics of the conflict was clear: this time was different. Either something major would come along to change the game, or an attack was happening.

The Last Offramp: Ceasefire Talks and Their Dim Prospects

If any offramp remained that could convince Iran to stand down, it was a ceasefire deal between Israel and Hamas. A major round of talks was scheduled for Thursday, August 15, a deadline that carried two possible implications. If Iran was open to a drawdown of hostilities at the eleventh hour, it might wait until Thursday to see if a deal could materialize. Alternatively, if Iran had no remaining interest in being talked down, it might attack before the talks could even take place.

The prospects for those talks, however, were bleak. On Sunday, August 11, Hamas announced that it did not intend to send a delegation to the talks in their current form. Instead, Hamas insisted that the three mediator nations — the United States, Egypt, and Qatar — submit a plan that would implement the truce proposal US President Joe Biden had announced back in May.

Israel had since added new demands, several of which were believed to be non-starters for Hamas. Israeli Prime Minister Benjamin Netanyahu continued to hold firm to the idea of ‘total victory’ in Gaza, despite even his own Defense Minister calling such an idea nonsense in recent days. The combination of Israel’s hardened stance, Hamas’s fury over the killing of its leader, and recent mass-casualty Israeli airstrikes had led Hamas to disengage from the Thursday talks, at least for the time being.

Intense efforts by mediator countries to bring Hamas back to the negotiating table were expected in the intervening days, but the outcome remained deeply uncertain.

Lessons from April: What Iran Learned About Israeli Air Defenses

As the potential offramps narrowed, the stakes for any Iranian attack grew dramatically higher. Central to understanding the threat was the precedent set by Iran’s April 2024 attack on Israel, which provided Iran with invaluable intelligence about Israeli defensive capabilities.

In April, Iran launched hundreds of drones and cruise missiles against Israel, along with dozens of far more dangerous ballistic missiles. Israel defended against the attack with help from the United States, Jordan, and other nations, and the attack appeared to have been designed to minimize casualties. But even under those constrained conditions, Iran was able to overwhelm sections of Israel’s highly touted air defense systems.

Like any air defense network, Israel’s can only handle so many targets simultaneously before either running out of interceptors or having its targeting software overwhelmed. While Iran’s probing attack in April did not produce a decisive breakthrough, it gave Iran all the information it needed about how such a breakthrough could be achieved in a follow-up assault. Had the current crisis occurred in March, Iran would have been relying on rough estimates of Israeli air defense capabilities.

Now, Iran knew for certain.

There was, however, a small note of hope embedded in the April precedent. That attack represented an Iranian strike designed to prove a point rather than cause mass casualties. Iran’s ballistic missiles were targeted toward only minimally relevant targets where civilian deaths were unlikely, offering Israel a kind of violent olive branch: ‘We had to attack you, but we didn’t make it hurt like we could have, so let’s all take a deep breath and settle down.’ Whether Iran would have any interest in calibrating a similar signal this time remained unclear, but the fact that it had done so once before — also in the wake of a damaging assassination — and now had a better blueprint to execute such a calibrated strike, offered some small consolation.

Hezbollah’s Role: The Force Multiplier

Of great interest to international observers was the potential role of Hezbollah in Lebanon, which could add its own troops and significant firepower to any Iranian attack. Hezbollah was deeply incensed toward Israel, not only because of a months-long, low-grade conflict on the Israel-Lebanon border, but because of yet another recent Israeli strike — this one killing a top Hezbollah commander named Fuad Shukr in the Lebanese capital of Beirut. Shukr was the highest-ranking Hezbollah member killed since 2008, and Hezbollah had vowed retaliation.

Aside from Iran itself, Hezbollah was by far the most powerful Iran-allied organization in the region and the most capable in the event of an attack. It brought to bear well over 100,000 rockets, thousands of elite and experienced fighters, and plans of attack and asymmetric warfare that had been honed within its ranks for a generation. By launching rockets at short range, Hezbollah could occupy and even overwhelm short-range defenses like Israel’s Iron Dome all by itself, distracting a portion of Israel’s air defense apparatus and clearing a path for Iranian long-range munitions to reach their targets. Militias in Syria could play a similar role, further stretching Israel’s defensive capacity across multiple fronts simultaneously.

Possible Attack Scenarios and Their Consequences

The anticipated Iranian attack could take many forms — from an asymmetric assault using Iranian and allied assets from Iraq, Syria, and Lebanon, to a lightning strike from Iranian warplanes. However, the most likely scenario appeared to be a combined missile, drone, and possible aircraft assault on a scale greater than what was seen in April. Even if Israel gained direct defensive support from the United States, Jordan, and other nations a second time, Iran understood that Israel’s air defense had a limit — and that it could overwhelm those defenses with the arsenal at its disposal.

The timing of the attack was also subject to analysis. Iran had already waited more than two weeks; a few more days to allow the ceasefire route a chance to bear fruit was plausible. The Jewish holiday of Tisha B’Av on August 13 had already passed, and the next major Jewish high holiday, Rosh Hashanah, was not until October, meaning that exploitable moments Israel’s adversaries had relied on historically were not available. A strike over the weekend was considered possible, as many in Israel observe a weekly Shabbat from sunset Friday to sunset Saturday.

Once an attack was launched, the outcome would come down to a question of Iranian intent. Perhaps the greatest psychological victory for Iran would be to demonstrate how capably it could overwhelm Israel’s air defenses — the Iron Dome, the Patriot system, fighter-plane patrols, and other mechanisms that are a simple fact of life in Israel and hold deep, often traumatic psychological value for its citizens. To demonstrate that these systems could be overwhelmed completely, even if the missiles and rockets that got through crashed down in empty areas, would hand Iran an undeniable victory and send a crystal-clear message: ‘We can do this to you, anytime we want.’ From a public-confidence standpoint alone, that would be devastating to Israel.

But if Iran’s intentions extended beyond shattering public confidence, the consequences could be far more catastrophic. Once Israel’s air defenses were sufficiently disrupted, it would simply be a matter of Iran selecting targets for the missiles and drones that penetrated the defensive screen. Iran could choose whether to couple unmanned systems with assaults by manned aircraft, including its old but still impressive American-made F-14s.

It could choose whether to coordinate chaos in the skies with chaos on the ground. If Iran chose to coordinate with Hezbollah, it could time a Hezbollah ground offensive in northern Israel — sowing chaos, attacking military and civilian targets alike, and potentially taking hostages on a scale that would make October 7 look restrained by comparison. Such a scenario would very likely topple the entire Middle East into full-scale war.

The Initiative Lies with Tehran

Iran and Israel have demonstrated the ability to draw down confrontations when they choose to — they had done so as recently as April 2024. But the critical variable was not capability; it was willingness. Whether Iran would choose to leave that door open remained entirely unknown. Barring a pre-emptive strike by Israel and its allies, the initiative lay fully and entirely with Iran. When Iran would make its move, nobody but the Ayatollah and his allies would know, until the moment arrived.

The situation as of mid-August 2024 represented one of the most dangerous inflection points in the modern history of the Middle East. The diplomatic guardrails had eroded. The military preparations on all sides pointed toward escalation rather than de-escalation. The ceasefire talks that represented the last viable offramp were in jeopardy.

And the lessons Iran had learned from its April probing attack gave it a clearer blueprint than ever for overwhelming Israel’s defenses. What happened when the moment of decision arrived could write the future of the entire Middle East for years, or even decades, to come.

Presented by

Simon Whistler

Simon Whistler is one of YouTube's most prolific educational creators. WarFronts is his deep dive into military history and conflict analysis.

Frequently Asked Questions

Why did Iran vow to retaliate against Israel?

Iran vowed retaliation after the assassination of Hamas political leader Ismail Haniyeh in Tehran on July 31, 2024. Haniyeh was killed while staying as Iran’s honored guest during the inauguration of Iran’s new president, shortly after meeting with Iran’s Supreme Leader. For Iran, this was an unforgivable offense — a killing on Iranian soil targeting a guest of the state during a symbolically significant political event.

What did Iran learn from its April 2024 attack on Israel?

Iran’s April 2024 attack, which involved hundreds of drones and cruise missiles plus dozens of ballistic missiles, revealed critical information about the limits of Israeli air defenses. Iran was able to overwhelm sections of Israel’s air defense systems, discovering that like any such network, Israel’s can only handle so many targets simultaneously before running out of interceptors or having its targeting software overwhelmed. This intelligence could inform a far more devastating follow-up assault.

Why did the United States publicly announce submarine deployment?

The US Department of Defense took the rare step of publicly announcing the deployment of a guided-missile submarine to waters near the Middle East as an intentional deterrence signal aimed directly at Tehran. The significance lay not in the submarine’s presence — US submarines likely operate in those waters frequently — but in the fact that the United States chose to reveal its position publicly.

What role could Hezbollah play in an Iranian attack?

Hezbollah could significantly amplify any Iranian attack. The organization brings over 100,000 rockets, thousands of elite and experienced fighters, and sophisticated attack plans. By launching rockets at short range, Hezbollah could occupy and overwhelm short-range defenses like Israel’s Iron Dome, distracting a portion of Israel’s air defense apparatus and clearing a path for Iranian long-range munitions to reach their targets. Militias in Syria could play a similar role, stretching Israel’s defensive capacity across multiple fronts.

What were the prospects for ceasefire talks scheduled for August 15?

The prospects were bleak. Hamas announced on August 11 that it would not send a delegation to the talks in their current form, instead insisting that mediator nations submit a plan implementing the truce proposal President Biden announced in May. Israel had added new demands since then, several believed to be non-starters for Hamas. Prime Minister Netanyahu continued to hold firm to the idea of ‘total victory’ in Gaza, despite his own Defense Minister calling such an idea nonsense.