In the letter dated 9 October, and sent after US troops were pulled out of Syria, U.S. President Donald Trump used an "inappropriate" diplomatic language towards his Turkish counterpart Recep Tayyip Erdoğan to "threaten" Turkey with "tough sanctions" over the cross-border military operation dubbed "Operation Peace Spring", that was launched by Turkey-led forces to remove YPG and Daesh terrorists out of the northeastern region of war-torn Syria.
Turkish presidential sources told reporters that the "threatful" letter was "thoroughly rejected" by Turkish President Recep Tayyip Erdoğan.
On the day the letter was received, Turkey launched a cross-border offensive into northeastern Syria to drive "terrorist elements" out of the planned safe-zone.
In response, Turkish presidential sources said: "President Erdoğan received the "unacceptable" letter, thoroughly rejected it and put it in the bin."
