To have an impact, this kind of intervention needs clear objectives

By Patrick Cockburn

"....The Americans, the British and the French have come to understand that establishing a no-fly zone is not enough. Colonel Gaddafi's main strike force consists of tanks and infantry, so inability to use aircraft might not be sufficient to stop him capturing Benghazi and eastern Libya.....

There is less clarity with Libya. Is the aim to defend the rebels in the eastin the east of the country?

Will it extend to any surviving rebel strongholds in the west, such as Misurata, where there has been street fighting? Is the aim to get rid of Colonel Gaddafi? No-fly zones on their own are difficult to make work effectively.....

.....The problem is that it is not clear who the US and Europe will be aiding. The most surprising development in this uprising is that it began with the defection of military units but these, until the last few days, have not appeared on the battlefield. Hillary Clinton says what really changed her mind about intervening in Libya was the Arab League's statement calling for action. But the members of this somewhat discredited body are mostly autocracies which may dislike Gaddafi, but whose methods of government are no less repressive. "