SSE teams to find traces of chemical weapons. SEALs carried out missions around Nasiriyah, carrying out reconnaissance on surrounding villages and engaging enemy strong points bypassed by the US Marine advance. Charlie Platoon, SEAL Team 3, later operated ahead of the Marine advance carrying out similar missions. SEAL and GROM units continued to cooperate throughout the rest of the invasion phase, with raids and anti-sniper missions in Baghdad. Post-invasion Iraq Following the invasion, SEAL platoons rotated through Iraq, conducting overwatch for US and Iraqi patrols and directly mentoring local Iraqi forces; they also conducted surveillance and sniping missions into known trouble spots. In September 2004, a SEAL sniper element was tasked with establishing an overwatch and surveillance position overlooking Haifa Street, they were inserted by Bradley IFVs from a unit of the 9th Cavalry Regiment, however they were spotted and engaged by insurgents. The SEALs notified the Bradleys, they drove back, fired on the insurgents and set up a cordon for the SEALs to be extracted, one Bradley was destroyed by a car bomb, there were no casualties and the SEALs were extracted. In the interim between the First Battle of Fallujah and Second Battle of Fallujah, insurgents in Fallujah knew that the coalition assault was inevitable and under the guidance of the influx of foreign fighters, began to build defensive networks throughout the city-ranging from fortified buildings, trench lines, berms, strategically placed car bombs and IEDs. In preparations for the second battle, SEALs conducted reconnaissance near the berms and tested out reports that the insurgents were equipped with night-vision equipment, they proved this by throwing an infrared chemical light into the street which drew small arms fire. SEALs along with the 5th SFG, Marine Force Recon and Det One and other JSOC elements were heavily involved in shaping operations prior to 7 November D-DAY when coalition forces entered the city. The SOF shaping included sophisticated feints to mislead the insurgents as to the direction of the final assault, close target reconnaissance and direct-action missions where a logistics node or IED factory was targeted. When the offensive on the insurgents in the city began, many of the US Marine companies had SEAL sniper teams attached to them, mainly from SEAL Teams 3, 5 and 10. From 2005, SEALs were heavily committed to western Iraq in Al Anbar Governorate, AQI terrorists who escaped Fallujah had relocated to Ramadi. A SEAL Task