On 26 February 1991 British artillery units unleashed an hour long artillery strike on Iraqi positions. It was the greatest British artillery display since World War II. That same night the British 7th Brigade fought a night tank battle against an Iraqi tank battalion from the Iraqi 52nd Armored Division. After ninety minutes of battle over 50 Iraqi tanks and armoured personnel carriers were destroyed. That same night the British 4th Brigade destroyed a headquarters and artillery site belonging to the 807th Brigade of the Iraqi 48th Infantry Division. British infantry units cleared Iraqi defensive positions which were occupied by the Iraqi 803rd Infantry Brigade. After 48 hours of combat the British 1st Armoured Division destroyed or isolated four Iraqi infantry divisions (the 26th, 48th, 31st, and 25th) and overran the Iraqi 52nd Armored Division in several sharp engagements. For several hours the 4th Brigade was involved in a battle against a battalion of dug in Iraqi soldiers and T-55 tanks. A Challenger 1 tank achieved the second longest range confirmed tank kill of the war, destroying an Iraqi tank with an armour-piercing fin-stabilised discarding-sabot (APFSDS) round fired over a distance of —the second longest tank-on-tank kill shot recorded. The longest tank kill recorded was achieved by a Challenger 1 from the Royal Scots Dragoon Guards at a range of . The British 7th Brigade cleared Objective Platinum destroying at least six additional T-55 tanks in dug in positions and a bunker using Milan missiles. The 4th Brigade seized Objective Steel defeating the Iraqi 103rd Brigade, 25th Infantry Division in the process. As the British 4th Brigade advanced they destroyed additional Iraqi guns and fighting positions. The British lost two Warrior combat vehicles to friendly fire in the process.