March 16th 1988; Thousands of people were killed and many others injured in a poison gas attack on a Kurdish city in northern Iraq. Up to 20 aircraft, said to include Iraqi Migs and Mirages, were seen overhead at around 1100 local time in Halabja. According to experts, the chemicals dropped by the planes may have included mustard gas, the nerve agents sarin, tabun and VX and possibly cyanide. The attack on Halabja, which is about 150 miles (241km) north-east of the Iraqi capital Baghdad, is the latest in the Iran-Iraq war and follows its occupation by Iranian forces.

Iraq was said to be keen to avenge the fall of Halabja, which is seen as an important centre for Kurdish resistance in their struggle for autonomy. The assault came after two days of conventional mortars, artillery and rockets from nearby mountains. According to pro-Iranian Kurdish commanders in Halabja, there were up to 14 aircraft sorties, with seven to eight planes in each group. The planes were believed to have concentrated their attacks on the city and all the roads leading out of it.