Humanitarian agency says it's preparing for scenario in which up to 400,000 flee Kurdish areas

Thousands throughout Europe protest Turkish assault on Syria's Kurds, while Ankara remains defiant

SDF chief said to accuse Washington of immoral behavior: 'You are not willing to protect the people, but do not want another force to come and protect us'

War monitor group also says Erdogan's troops enter heart of Ras al-Ayn, marking most significant gain since invasion began; Kurdish Syrian Democratic Forces say they're still there

At least 24 civilians and 42 soldiers killed, more than 70,000 displaced in offensive, facilitated by US withdrawal, that draws sharp international criticism

Despite fears its threatened offensive against a Kurdish militia could bolster jihadists, Turkey says it won't allow IS to return to area