During or shortly before the invasion of Iraq in March 2003, Zarqawi returned to Iraq, where he met with Bin Laden's military chief, Saif al-Adel (Muhammad Ibrahim Makawi), who asked him to coordinate the entry of al-Qaeda operatives into Iraq through Syria. Zarqawi readily agreed and by the fall of 2003 a steady flow of Arab Islamists were infiltrating Iraq via Syria. Although many of these foreign fighters were not members of Tawhid, they became more or less dependent on Zarqawi's local contacts once they entered the unfamiliar country. Moreover, given Tawhid's superior intelligence gathering capability, it made little sense for non-Tawhid operatives to plan and carry out attacks without coordinating with Zarqawi's lieutenants. Consequentially, Zarqawi came to be recognized as the regional "emir" of Islamist terrorists in Iraq without having sworn fealty to bin Laden.