By Timour Azhari, Phil Stewart, Jonathan Spicer and Suleiman Al-Khalidi DAMASCUS (Reuters) -The United States encouraged its Syrian Kurdish allies to reach Monday's landmark deal with the Islamist-led government in Damascus,

It was a development in the Syrian drama almost as unexpected as the stunningly swift fall of the Assad regime that had dominated this country for decades.

The scenes of elation following Monday night's declaration came in sharp contrast to the grim scenes in coastal communities wracked by days of clashes.