Israel–Lebanon Southern Escalation: Mount Hermon & Ali Al-Taher Strikes (2026)

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## Overview Israel conducted a major military operation in southern Lebanon in September 2026, destroying large parts of the Ali Al-Taher heights near Nabatiyeh and drawing international attention to Israeli activity around Mount Hermon, prompting significant diplomatic pushback at the UN and visible Lebanese government responses (Arab News, September 11-12). ## Key Developments - On Thursday night (Sept. 10), Israel destroyed large parts of the Ali Al-Taher heights in southern Lebanon, with massive explosions shaking Nabatiyeh and surrounding villages, as well as towns in Jezzine, Hasbaya, and Marjayoun (Arab News, September 11). - It remained uncertain whether Israel would stop after destroying the heights or seek to seize further Lebanese territory to gain leverage ahead of direct negotiations with Lebanon (Arab News, September 11). - More than 40 countries — spanning the Arab world, Africa, Asia, Europe and Latin America — stood with Syria at the UN, with Syria's envoy Ibrahim Olabi accusing Israel of violating Syrian sovereignty by dispatching officials to the Mount Hermon summit on Sept. 9 (Arab News, September 11). - Lebanese President Joseph Aoun made a surprise visit to Nabatiyeh on September 12, accompanied by security chiefs and the Lebanese Army commander, saying the visit was intended to send a message that the state stood with residents and was working to provide services so they could remain in the area safely (Arab News, September 12). ## Strategic Significance This episode is part of the broader, ongoing Israel-Lebanon conflict dynamic (already tracked in related pages on Israel-Lebanon negotiations, ceasefire, and Israeli military escalation). The Mount Hermon dimension adds a Syria angle, with international diplomatic backlash at the UN signaling growing multilateral concern over Israeli territorial actions post-Assad. This matters for Lebanese sovereignty, Israel-Syria post-war dynamics, and ongoing US-brokered Israel-Lebanon negotiations. ## Open Questions - Will Israel expand its territorial actions in southern Lebanon or Mount Hermon further? - How will this affect the ongoing Israel-Lebanon Washington-brokered negotiations? - Will Syria's UN campaign lead to any binding action or merely diplomatic pressure?