The article reports on violence in the British-controlled area around Basra, Iraq. A few protesters were shot dead and a police barracks stormed by British troops after Iraqi police arrested, and then refused to release, two of their comrades. It revealed the alarming potential for chaos in one of the country's most peaceable areas--which happens to be a heartland of the country's Shia rulers and the repository of most of Iraq's oil. Tensions started boiling on September 18th, when British soldiers arrested the Basra boss of the Mahdi Army, a militia loyal to Muqtada al-Sadr, a fiery Shia nationalist, who twice last year set southern Iraq ablaze. They accused him of organising roadside bombs that have killed nine people, including two British soldiers, in the past two months. Basra may be the most tightly controlled of the four southern "British" provinces. Of the rest, Muthanna, home to a small Australian garrison, is fairly tranquil, but dominated by the local officials of Supreme Council for Islamic Revolution in Iraq (SCIRI). Farther east, much of Maysan, including the city of Amara, is out-of-bounds to British troops; the SCIRI's Badr Brigades and the Sadrists vie for control of Maysan as well as neighbouring Dhi Qar province, especially its main town of Nasiriya, where a small garrison of Italian troops is loth to leave its base. Britain hopes to quit Muthanna, and perhaps Maysan, this year, and Dhi Qar and Basra next year. As this week's violence shows, it will not be a glorious exit: nowhere in southern Iraq is the central government in firm control. Yet with so few forces to control so vast and vexed a region, the British have never pretended to be doing much more than paper over the cracks.