Operation 'Eternal Darkness' - a surprise strike delivered by the IDF on Hezbollah - was supposed to be the opening blow of a plan formulated even before the current war. Nearly all of Hezbollah's secret headquarters were attacked in the opening strike. According to reports, between 300 and 350 operatives were killed, including commanders. About 100 headquarters were attacked within 10 minutes. A security official described the operation as a significant success, beyond the 'pager operation,' in which mainly operatives and not commanders were killed. If the eliminations were indeed successful, this represents a particularly significant blow to the organization's command structure.