On 27 February 1991 a joint British and American artillery fire mission destroyed what was left of Iraqi artillery and infantry forces at Objective Tungsten. Approximately 70 Iraqi artillery pieces were destroyed. The British also took Objective Waterloo. In the process the British destroyed approximately five Iraqi divisions in 48 hours of combat. The British 1st Armoured Division secured the final objectives on the Basra Highway north of Multa Ridge. In the final operation the British 7th Brigade took Objective Cobalt while the 4th Brigade halted farther west. The British 1st Armored Division had traveled 217 miles in 97 hours. The British 1st Armored Division had captured or destroyed about 300 tanks and a very large number of armored personnel carriers, trucks, reconnaissance vehicles, etc. The Desert Rats also destroyed multiple Iraqi artillery positions. The division also took over 7,000 Iraqi prisoners of war including two division commanders and two other general officers. British forces did not lose a single Challenger 1 tank during combat operations. The British suffered 15 soldiers killed and another 43 soldiers wounded during combat operations. The British also lost 2 British Warrior APCs in a friendly fire incident.