Worse, the American military had convinced the Syrian Defense Forces, despite the recent build-up of Turkish tanks and guns along the Syrian border, to dismantle their defense fortifications along the border starting in September, with the assurance that the United States and Turkey had agreed on a five mile demilitarized safe zone or "Peace Corridor" inside northeastern Syria to maintain security along the Turkish-Syrian border.
Then came Donald Trump's October 6 phone call with Erdogan, a call that will surely go down in infamy. Hours after that phone call Trump called back American troops from Northeastern Syria and three days later Turkish missiles were devastating Kurdish towns,
https://www.militarytimes.com/flashpoints/2019/09/03/us-backed-syrian-kurds-to-remove-fortifications-from-turkish-border-as-part-of-safe-zone-deal/
https://www.militarytimes.com/opinion/commentary/2019/10/08/trump-syria-withdrawal-decision-immoral-and-short-sighted/
https://en.wikipedia.org/wiki/Northern_Syria_Buffer_Zone
https://www.csis.org/analysis/implications-turkish-intervention-northeastern-syria
https://www.cnn.com/2019/10/09/politics/turkey-syria-us-anger-ramifications
/index.html
https://www.businessinsider.com/trump-abandoning-kurds-sends-dangerous-message-us-allies-2019-10
https://www.newsweek.com/exclusive-official-who-heard-call-says-trump-got-rolled-turkey-has-no-spine-1463623
ttps://www.nbcnews.com/politics/national-security/chaos-syria-washington-after-trump-call-erdogan-unleashed-turkish-military-n1063516
https://www.nytimes.com/2019/10/09/world/middleeast/turkey-attacks-syria.html
https://www.cnn.com/middleeast/live-news/syria-turkey-military-offensive-dle-intl/index.html
https://www.nbcnews.com/news/world/turkey-launches-operation-syria-3-days-after-trump-announces-u-n1063576