In October 2004, when al-Zarqawi swore loyalty to Osama bin Laden and al-Qaeda, he renamed the group Tanẓīm Qāʻidat al-Jihād fī Bilād al-Rāfidayn (transl. "The Organisation of Jihad's Base in Mesopotamia"), commonly known as al-Qaeda in Iraq (AQI).[7][8][9][10][11] Although the group never called itself al-Qaeda in Iraq, this remained its informal name for many years.[12] Attacks by the group on civilians, Iraqi government forces, foreign diplomats and soldiers, and American convoys continued with roughly the same intensity. In a letter to al-Zarqawi in July 2005, al-Qaeda's then deputy leader Ayman al-Zawahiri outlined a four-stage plan to expand the Iraq War. The plan included expelling US forces from Iraq, establishing an Islamic authority as a caliphate, spreading the conflict to Iraq's secular neighbours, and clashing with Israel, which the letter said, "[...] was established only to challenge any new Islamic entity".[13]