William Rubak, also a deputy to former US envoy to Syrian Kurdish-controlled areas, told CBS News that Turkey's 2019 attack on Syrian Kurdish-controlled areas had led to the expulsion of a large numbers of Kurds, adding that "For example, the Kurds in a city like Tel Abyad in northern Syria were completely expelled by the Turkish invasion."

The former US deputy envoy to the anti-ISIS coalition stressed that US military commanders in Kurdish-controlled areas of Syria were shocked by former US President Donald Trump's order to withdraw US troops from the area, and that the decision had a negative impact on the Syrian Kurdish alliance and the US government.

He stressed that Turkey's invasion of Syrian Kurdish-controlled areas in 2019 resulted in the ethnic cleansing of Kurds in those areas and an inhumane treatment of the Kurds.

"The Syrian Kurdish forces were the best forces the United States has trained in decades," said Mr. Rubak about the reason behind the US alliance with Syrian Kurdish forces in the war against the ISIS.

The former Washington official stressed that the Syrian Kurds played an important and undeniable role in the fight against the ISIS.

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