On 4 April 2004, the Mahdi Army attacked the Spanish-Salvadoran-ALARNG base (Camp Golf, later renamed Camp Baker) in An Najaf, part of a coordinated uprising across central and southern Iraq in an apparent attempt to seize control of the country ahead of the 30 June 2004 handover of power to a new Iraqi government. This uprising led to the American troops arriving in the city in the wake of the Spanish withdrawal. In August 2004, heavy fighting broke out again between US forces and Al-Sadr's Mahdi Army. The battle lasted three weeks and ended when senior Iraqi cleric Grand Ayatollah Ali al-Sistani negotiated an end to the fighting.