Tucked between the Mediterranean and the Sahara, the Libyan town of Brega was a rather somnolent back-of-the-beyond place on the Gulf of Sidra in the north of the country. No longer. Brega, which sits on an oil lake, has become a battlefield in the fight against the government of Colonel Muammar Qaddafi. Bombs drop among oil depots filled with hundreds of thousands of barrels, and in the past two weeks, the company managers have had to deal with four changes of regime. To hedge bets they keep in touch with both the rebels in Benghazi, to the east, and the Qaddafi regime in Tripoli, to the west. The battle for Brega and a nearby but larger terminal, Ras Lanuf, has significantly upped the stakes in Libya’s conflict.