For most attacks, the Iraqi guerrillas operate in small teams of five to ten men in order to maintain mobility and escape detection. Larger attacks involving as many as 150 men have appeared on occasion since April 2004 (although larger units had also appeared in a few instances beforehand, such as a battle near the Syrian border town of Rawa on June 13, 2003 and a large ambush of a U.S. convoy in the town of Samarra on November 30, 2003).