The past week marked a decisive turning point in the trajectory of the US–Israel war on Iran. What began as a fragile pause in fighting quickly unravelled under the weight of unresolved disputes, competing priorities, and continued escalation across the region. Developments between 6 and 12 April indicate that the conflict is no longer moving toward de-escalation.

Instead, it is entering a more prolonged and complex phase defined by failed diplomacy, strategic pressure, and a widening gap between political expectations and battlefield realities. At the centre of the week's developments were the high-stakes negotiations in Islamabad, mediated by Pakistan and aimed at stabilising a temporary ceasefire. After more than 20 hours of discussions, the talks ended without agreement.

Both sides acknowledged that key differences could not be resolved. The United States entered the negotiations with a set of broad and far-reaching demands. These included halting Iran's uranium enrichment, placing limits on its military capabilities, and ensuring unrestricted navigation through the Strait of Hormuz.

Iran, however, approached the talks from a fundamentally different position. Tehran insisted on maintaining its nuclear programme, preserving full sovereignty over the Strait of Hormuz, securing sanctions relief, and obtaining guarantees that any ceasefire would extend beyond Iran itself, particularly to Lebanon. Iranian officials described the US demands as excessive and unrealistic, arguing that they reflected a position of pressure rather than negotiation.

American officials, in turn, indicated that Iran was unwilling to compromise on core issues. The result was a diplomatic deadlock that effectively ended hopes of a near-term political resolution. Lebanon as fault line One of the central reasons for the collapse of negotiations was the disagreement over Lebanon.

Iran made clear that any meaningful ceasefire must include a halt to Israeli military operations in Lebanon. From Tehran’s perspective, separating the two theatres was unacceptable, given the conflict's interconnected nature. The United States rejected this linkage, maintaining that Lebanon was outside the scope of the agreement.

Israeli Prime Minister Benjamin Netanyahu reinforced this position by stating explicitly that there was no ceasefire in Lebanon. At the same time, Israeli airstrikes on southern Lebanon continued during the negotiations, further eroding trust and undermining the diplomatic process. This divergence exposed a structural weakness in the ceasefire framework: the absence of a shared understanding of what the ceasefire actually covered.

Israel's military posture played a decisive role throughout the week. By continuing operations against what the Israelis claim are "Hezbollah targets" while talks were underway, Israel effectively signalled that the ceasefire framework would not constrain it. This not only intensified tensions on the ground but also shaped the political environment in which negotiations took place.

For Iran, this reinforced the perception that negotiations with Washington could not be separated from Israel’s actions. As a result, Lebanon became both a battlefield and a diplomatic obstacle, directly linking regional dynamics to the failure of the talks. Hormuz blockades Alongside the collapse of diplomacy, tensions in the Strait of Hormuz escalated significantly.

Iranian forces issued direct warnings to a US warship attempting to pass through the Strait on 11 and 12 April. According to Iranian accounts, the vessel altered its course following the warning. These incidents highlight a broader shift.

The Strait of Hormuz is no longer simply a strategic bargaining tool. It is becoming an active zone of confrontation where military signalling and economic pressure intersect. US President Donald Trump added to the escalation by suggesting that maritime access could be restricted and that vessels would not be allowed to operate freely under certain conditions.

He also claimed that US forces had degraded elements of Iran’s naval, air, and radar capabilities. Iranian officials rejected these claims and reiterated that control over the strait remains a core component of national security. The failure of negotiations has reinforced the economic dimension of the conflict.

Energy markets have responded with increased volatility, while shipping routes and insurance costs have been affected by the heightened risk in the Gulf. Control over the Strait of Hormuz has emerged as a key economic lever. Any disruption in this corridor has immediate global consequences, linking the conflict directly to international markets.

At the same time, both sides appear to be using economic pressure as part of a broader strategy of attrition rather than seeking rapid military outcomes. Conflict with no resolution Inside Iran, daily life continues, though under increasing pressure. Authorities maintain that there are no shortages of essential goods such as food