AL-EGILA, Libya (AP) - Libyan rebels took back a key oil town and pushed westward Sunday toward the capital, seizing momentum from the international airstrikes that tipped the balance away from Moammar Gadhafi's military.

Brega, a main oil export terminal in eastern Libya, fell after a skirmish late Saturday and rebel forces moved swiftly west, seizing the tiny desert town of Al-Egila _ a collection of houses and a gas station -- on their way to the massive oil refining complex of Ras Lanouf.

``There was no resistance. Gadhafi's forces just melted away,'' said Suleiman Ibrahim, a 31-year-old volunteer, sitting in the back of a pickup truck. ``This couldn't have happened without NATO. They gave us big support.'' He said that rebels had already reached Ras Lanouf.

Ras Lanouf and Brega combined would be responsible for a large chunk of Libya's 1.5 million barrels of daily exports, which have all but stopped since the uprising that began Feb. 15 and was inspired by the toppling of governments in Tunisia and Egypt.

``As they move round the coast, of course, the rebels will increasingly control the exit points of Libya's oil,'' British Defense Secretary Liam Fox told the BBC. ``That will produce a very dynamic and a very different equilibrium inside Libya. How that will play out in terms of public opinion and the Gadhafi regime remains seen.''

The Gadhafi regime on Saturday acknowledged the airstrikes had forced its troops to retreat and accused international forces of choosing sides.

``This is the objective of the coalition now, it is not to protect civilians because now they are directly fighting against the armed forces,'' Khaled Kaim, the deputy foreign minister, said in the capital, Tripoli. ``They are trying to push the country to the brink of a civil war.''

Fox denied that the international force hoped to oust Gadhafi: ``Losing Gadhafi is an aspiration, it is not part of the U.N. resolution.''

The U.N. Security Council authorized the operation to protect Libyan civilians after Gadhafi launched attacks against anti-government protesters who demanded that he step down after 42 years in power. The airstrikes have crippled Gadhafi's forces, but rebel advances have also foundered, and the two sides have been talemate in key cities.

The rebel turnaround is a boost for President Barack Obama, who has faced complaints from lawmakers from both parties that he has not sought their input about the U.S. role in the conflict or explained with enough clarity about the American goals and exit strategy. Obama was expected to give a speech to the nation Monday.

``We're succeeding in our mission,'' Obama said in a radio and Internet address on Saturday. ``So make no mistake, because we acted quickly, a humanitarian catastrophe has been avoided and the lives of countless civilians -- innocent men, women and children -- have been saved.''

Pentagon officials say that forces loyal to Gadhafi are a potent threat to civilians. And they are looking at plans to expand the firepower and airborne surveillance systems in the military campaign, including using the Air Force's AC-130 gunship armed with cannons that shoot from the side doors, as well as helicopters and drones.

Fox, the British foreign minister, ruled out supplying arms to the rebels. ``We are not arming the rebels, we are not planning to arm the rebels,'' he said.

NATO's top decision-making body meets Sunday to expand its enforcement of the no-fly zone to include airstrikes against Libyan ground targets. Washington has been eager to hand off responsibility to NATO, which is expected to take command Sunday of the no-fly zone mission.