Counterinsurgency: Was a preemptive strike focused aggressively on non-compliant forces and former regime leaders who are planning attacks against coalition forces in an attempt to hinder coalition and Iraqi efforts in building a new Iraq. Was an American anti-insurgent sweep in Sallahadin and Diala provinces. It was conducted concurrently with Operation Soda Mountain. The operation was centered on a section of Highway 1 north of Baghdad near the towns of Bayji, Huwayiah, and Samarra. The American action was based on the Fourth Infantry Division whose insignia is ivy. This is a play on the Roman numeral “IV”.