Key events since the UN Security Council approved international measures to protect civilians in Libya:
March 19: French jets attack Muammar Gaddafi's forces. US and British warships fire more than 100 missiles at Libyan targets, after the UN Security Council agrees a resolution approving military action.
March 21: Gaddafi's forces retreat from the rebel stronghold of Benghazi.
March 26-28: After a barrage of western air strikes,rebels take over the eastern towns of Ajdabiya and Brega, moving on to the oil town of Ras Lanuf and Bin Jawad, before stopping 60 kilometres (37 miles) from Sirte.
March 29:- Gaddafi loyalists push rebels back in eastern Libya.
- International powers meeting in London fail to agree on how Gaddafi should go.
March 30:- Gaddafi's forces overrun Ras Lanuf and Brega
- Libyan foreign minister Mussa Kussa defects to Britain.
March 31: NATO takes full command of all Libyan operations.
April 1:- Rebels battle with Gaddafi's forces for Brega.
- NATO kills nine rebels and civilians near Brega.
April 3: Ali Treiki, former Libyan foreign minister, becomes the latest official to abandon Gaddafi.
April 4: -Rebels reject proposals from two of Gaddafi's sons for a transition to a constitutional democracy under which one of them would head the country.
- Italy joins France and Qatar in recognising the rebel Transitional National Council.
April 5:- Libya ready to negotiate reforms but not Gaddafi's resignation, a spokesman says.
- Rebels sustain their first significant loss of territory in almost a week, after they flee from the edge of Brega on the sixth day of fighting in the area.
- The government names Abdelati Obeidi foreign minister.
April 6: - NATO, accused by rebels of failing to protect civilians in the besieged city of Misrata, vows to do everything to do so.
- A tanker leaves Tobruk with the first rebel oil exports.
- Washington rebuffs a letter from Gaddafi in which he calls for an end to air strikes. It repeats that Gaddafi must go.
April 7: - Rebels and civilians flee Ajdabiya in their thousands on rumours that Gaddafi's forces are charging towards the town.
- A World Food Programme (WFP) aid ship arrives at Misrata, where heavy shelling by Gaddafi's forces has killed or wounded hundreds.
April 8:- NATO denies that there is any stalemate in Libya.
- Loyalist forces shell the edge of Ajdabiya forcing insurgents to retreat.
- NATO expresses regret at the deaths caused by an alliance air strike on three rebel tanks which killed at least four.