Tareena Shakil is the first British woman to be convicted of joining ISIS and encouraging acts of terrorism on social media after returning from the war zone.
The 26-year-old had told the court that she was unaware of the evil associated with ISIS and simply wanted to live under Sharia law.
But at the end of a two-week trial in Birmingham Crown Court, the jury concluded that she was guilty of terrorism related activity.
The jury was shown her tweets, messages and photographs, including images of the black flag of ISIS and passages calling on people to "take up arms".
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Shakil dressed up her son for pictures wearing an ISIS- branded balaclava after secretly running away to Syria in October 2014.
She told her family she was going on a package holiday to Turkey and instead travelled to Syria, where she remained for several months.
Her defence team claimed she had been "groomed" by ISIS recruiters who had preyed on her vulnerability following the collapse of her marriage.
She claims to have become disillusioned and frightened and on January 6 this year she left with her child and bribed a taxi driver 50 dollars to take her to the border.
Shakil flew back into the UK and was arrested by British police at Heathrow airport in early February.