Lebanon Becomes Breaking Point for Iran-Israel Ceasefire as Tehran Directly Strikes Israel

The Lead: Iran's Direct Response Changes Regional Dynamics

After weeks of warning that continuing Israeli attacks on Lebanon would jeopardize diplomacy, Iran launched its first direct strikes on Israel in two months overnight on Sunday, casting new doubts about the likelihood of a US-Iran peace deal. While Israel and the US have sought to separate Israel's occupation of southern Lebanon from the wider US-Israeli war on Iran, Iran has consistently stated that it will not entertain a peace deal that does not extend to Lebanon as well.

The Event Details: Tehran's Red Line in Beirut

Following an initial Israeli raid on the southern suburbs of Beirut on Sunday – despite US assurances last week that Israel would not attack the Lebanese capital as long as Hezbollah refrained from strikes on northern Israel – Iran launched missiles at Israel overnight in retaliation. "Tonight's operation was a warning, and if the aggressions are repeated, the responses will be broader and will encompass all American-Zionist targets in the region," Iran's Revolutionary Guards (IRGC) said in a statement.

Israel responded by carrying out multiple attacks across Iran on Monday, including the capital Tehran, despite US President Donald Trump reportedly telling Israeli Prime Minister Benjamin Netanyahu not to escalate. "I call the shots … he [Israeli Prime Minister Netanyahu] doesn't call the shots," Trump told the UK's Financial Times on Sunday.

The Human Cost: Devastation in Lebanon

Lebanon was drawn into the US and Israel's war on Iran on March 2 after Tehran-aligned Hezbollah launched attacks on northern Israel. Hezbollah said the attacks were in retaliation for Israel's killing of Iran's Supreme Leader, Ayatollah Ali Khamenei, on the first day of the US-Israeli war on Iran, on February 28.

At least 3,613 people have been killed and 11,072 others injured in Israeli attacks across Lebanon since the fighting began again in March, according to the latest figures from Lebanon's Health Ministry. More than one-million people have been displaced from their homes as Israel has occupied nearly one-fifth of the country.

The Impact Analysis: Iran's Strategic Shift

One of the most significant developments of the current conflict is that Iran is increasingly abandoning the logic that has defined its regional posture for years. "Initially, the whole point of 'forward defence' was to prevent a state-on-state conflict between Israel and Iran," Rob Geist Pinfold, international security lecturer at King's College London, told Al Jazeera.

"What we're seeing here is that Iran has completely changed that dynamic. Rather than using these proxy groups to fight for Iran, it is escalating itself as a state to fight for its proxy groups."

Iran has now bound any peace framework to the fate of its regional allies. "Tehran's message is: Together in war, together in peace," said Negar Mortazavi, senior fellow at the Center for International Policy.

The Prediction: A Violent Holding Pattern

If Washington cannot prevent Israeli actions that Tehran considers unacceptable, analysts warn that Iran may conclude that the US is incapable of delivering the comprehensive ceasefire it is seeking. "The key question is whether Trump is willing to really rein in Israel in any meaningful way," Nadim Houry, executive director of the Arab Reform Initiative in Lebanon, said.

For now, experts believe a temporary freeze in hostilities remains possible, but a durable peace appears much more difficult. "The more likely outcome is a violent holding pattern: talks continue, Iran and Israel keep testing each other, Hezbollah remains active, and the US tries to prevent the system from tipping into a wider campaign," Andreas Krieg, professor at the Department of Security at King's College London, concluded.