Analyst: Hezbollah's 'Imad 4' underground fortress on Ali al-Taher ridge not yet fully captured

The battle for the Ali al-Taher ridge has emerged as a focal point of the current confrontation in southern Lebanon. Rising to nearly 700 meters, the ridge provides critical fire control over the Nabatieh plateau and the Litani River basin. According to analysis by Hananel Aviv, IDF ground forces have successfully captured the lower portions of the terrain, but the upper crest—where the former 'Pumpkin' (Dalaat) outpost was located—remains a site of intense friction. Inside the mountain, Hezbollah continues to hold the 'Imad 4' facility, a strategic 'missile city' and command center for the organization's southern front.### The 'Imad 4' ComplexThe facility is described as a multi-level subterranean fortress carved deep into hard limestone, a feat reportedly achieved using Chinese tunnel-boring machines (TBM) and dual-use technology. Intelligence reports suggest the complex includes wide tunnels for missile-launching trucks, a field hospital, and a hardened communication network based on Chinese fiber-optic components, designed to be resilient against Israeli electronic warfare. The presence of dozens of trapped Hezbollah operatives inside the facility has turned the ridge into a high-stakes siege.### Operational Cost and Diplomatic PressureThe seizure of the ridge has come at a significant human cost. On Thursday, the commander of the 52nd Battalion and three additional soldiers were killed during an attempt to breach the upper sections of the complex. While the IDF maintains a perimeter around the facility, Aviv reports that the push to fully clear the underground network has been paused. This operational halt coincides with reports of American pressure on Jerusalem to maintain the current ceasefire framework, even as Iran uses diplomatic channels to demand an Israeli withdrawal from the strategic heights. For the IDF, the destruction of 'Imad 4' remains a priority, as the facility represents the 'nerve center' of Hezbollah's regional operations.