"The US military mission will continue to have as its overriding goal not to allow the" Islamic State "to take over again". "We must ensure that the resolution of this conflict does not put Iran closer to its goal of controlling the region."And Assad's continued military operations against his own citizens - including the use of chemical weapons, which provoked a military response by the United States last April - have created a humanitarian crisis of millions of refugees and only add to the instability in Syria, the secretary said."The persistence of Assad in power will fuel additional conflict and increase the risk of additional chemical weapons use", Tillerson said.He reiterated USA support for the UN-led process that envisions a unified and stable Syrian state without Assad in power, and called on Russian Federation to use its influence with Assad's regime to reach that end."The Assad regime clearly looks to Russian Federation as a guarantor of its security", Tillerson said". He called President Assad a brutal murderer of his own people who can never provide long-term stability.
Tillerson, in a speech at Stanford University, called for "patience" on Assad's departure, the clearest indication yet of an acknowledgment that the Syrian president has managed to hold on to power with the help of Russian Federation and Iran as his forces battle anti-government insurgents funded by Western governments and rich Arab Gulf states. Ultimately, the future of Syria must be determined by Syrians, the coalition maintains as the political in Syria shifts to a post-IS era.
"As we have seen from Iran's proxy wars and public announcements, Iran seeks dominance in the Middle East and the destruction of our ally Israel", he said.
The U.S. -led global coalition against Daesh said on Sunday that it would establish a 30,000-strong new border security force with the SDF/PKK - a group largely controlled and manned by the PYD/PKK terrorist organization.
Photo Syrians walked through a neighborhood destroyed in the fight against the Islamic State in the northern city of Raqqa this month.
In deciding to keep troops in Syria, Tillerson insisted that Washington is not being dragged into the almost seven-year-long Syrian civil war as a combatant.
"The United States will maintain a military presence in Syria, focused on ensuring ISIS can not re-emerge", Tillerson said using an acronym for the Islamic State group while adding that his government would also seek diplomatic efforts to resolve the conflict.More news: Dylan Farrow: 'I'm telling the truth'
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Instead, he argued that the USA role will provide stability to allow a UN-led peace process to resume and find a Syrian-led alternative to Assad's rule and the Iranian presence.
Assad's departure "will create the conditions for a durable peace within Syria and security along the borders for Syria's neighbors", Tillerson added later during a question-and-answer session.
Stressing that the USA presence in Syria is illegitimate, the ministry said Syria would fight against all terror groups in Syria as well as any illegitimate foreign existence in the country.
US forces in Syria have already faced direct threats from Syrian and Iranian-backed forces in the country, leading to the shoot-down of Iranian drones and a Syrian jet previous year, as well as to tensions with Russian Federation.
He called for the same mistake to be made again in 2011 when "early withdrawal from Iraq allowed al-Qaeda to survive in this country and mutate, giving life to the Islamic State group".
"Responsible change may not come as immediately as some hope for, but rather through an incremental process of constitutional reform and UN-supervised elections".