Although the Israeli intelligence community believed Hezbollah’s defensive network was based on “Iranian military doctrine,” another source suggests the elaborate system was based on “a defensive guerilla force organized along North Korean lines.” In fact, the same source concluded that, “All the underground facilities [Hezbollah’s], including arms dumps, food stocks, dispensaries for the wounded, were put in place primarily in 2003-2004 under the supervision of North Korean instructors.” Evidence would furthermore suggest that the Iranian Revolutionary Guard was also heavily involved in the construction effort. Intelligence sources concluded that Hezbollah was “believed to be benefiting from assistance provided by North Korean advisers, according to a July 29 report in al-Sharq al-Awsat. The report quotes a high- ranking Iranian Revolutionary Guards officer, who stated that North Korean advisers had assisted Hezbollah in building tunnel infrastructure, including a 25 kilometer underground tunnel.”