of its commanding officer. To cover the withdrawal, the company's platoon of LAV-25s and LAV-ATs (anti-tank variants) moved to engage the Iraqi force. After receiving permission, one of the anti-tank vehicles opened fire at what it believed was an Iraqi tank. Instead, the missile destroyed a friendly LAV-AT a few hundred meters in front of it. Despite this loss, the platoon continued forward and soon opened fire on the Iraqi tanks with the LAV-25s' autocannons. The fire could not penetrate the tanks' armor, but did damage their optics and prevented the tanks from fighting back effectively. Soon thereafter, a number of A-10 ground-attack aircraft arrived but found it difficult to pinpoint enemy targets and began dropping flares to illuminate the zone. One of these flares landed on a friendly vehicle, and although the vehicle radioed in its position, it was hit by an AGM-65 Maverick air-to-ground missile that killed the entire crew except for the driver. Following the incident, the company was withdrawn and the remaining vehicles reorganized into another nearby company. With observation post 4 cleared, the Iraqi 6th Armored Brigade withdrew over the border to Al-Wafrah under heavy fire from Coalition aircraft. Coalition forces had lost 11 troops to friendly fire and none to enemy action. While the events at observation post 4 were unfolding, the Iraqi 5th Mechanized Division crossed the Saudi Arabian border near observation post 1. A Company of the 2nd Light Infantry Armored Battalion, which was screening the Iraqi unit, reported a column of 60–100 BMPs. The column was engaged by Coalition A-10s and Harrier jump jets. This was then followed by another column with an estimated 29 tanks. One of the column's T-62 tanks was engaged by an anti-tank missile and destroyed. Coalition air support, provided by A-10s and F-16s, engaged the Iraqi drive through observation post 1 and ultimately repulsed the attack back over the Kuwaiti border. Aircraft continued to engage the columns throughout the night, until the next morning. Another column of Iraqi tanks, approaching observation post 2, were engaged by aircraft and also repulsed that night. An additional Iraqi column crossed the Saudi Arabian border to the East, although still along the coast, towards the city of Khafji. These Iraqi tanks were screened by the 5th Mechanized Battalion of the 2nd Saudi Arabian National Guard Brigade. This battalion withdrew when it came under heavy fire, as it had been ordered