Are backed by the United States but viewed by turkey as a terrorist organisation. On sunday, turkish troops crossed the border over the border, from where our correspondent, mark lowen, sent this report. As if syria needed more of this. Artillery fire from turkey, launching a new ground and air offensive. Its called operation olive branch, though its anything but a gesture of peace. From the skies, turkish f 16s struck yesterday, their target, the Syrian Kurdish militia known as the ypg. Turkey sees them as terrorists, linked to the outlawed kurdish militants, the pkk, and it wants them pushed back from the border town of afrin. Turkeys president has his own troops fighting for their hero, and with elections next year, war rallies his conservative supporters. Translation this is a National Struggle, and in this National Struggle we will crush anyone who stands against us but the ypg has powerful friends, they are trained and armed by the us. That has infuriated turkey, which says the a