In 2006, The IAF quickly destroyed all 17 of the group's border observation posts on the Blue Line. Likewise, Israel demolished the group's well-guarded headquarters complex in southern Beirut, which included fifteen-story buildings, with airstrikes. This complex oversaw administration, logistics, manpower, and intelligence work. Consequently, Hezbollah has since grown more decentralized and moved more infrastructure underground. The organization may have a central command center underneath the Iranian embassy in Beirut. In the 2006 war, Hezbollah "intelligently prepared the battlefield" and tailored their forces to the Israeli threat. The terrain of southern Lebanon is very favorable to the defender, and Hezbollah expanded on this advantage by anticipating how the IDF would fight and building or acquiring the infrastructure needed to hinder the IDF. Just as Hezbollah built large amounts of bunkers, Hezbollah also stored weapons and built infrastructure in civilian villages and towns. This enabled Hezbollah to fight from both urban and rural areas in southern Lebanon.