Since it controls cities on either side of the Syria-Iraq border, ISIS forces were able to quickly move weapons seized from Mosul into Syria on Monday.
The weapons, including Humvees, rifles, missiles and ammunition, will help arm ISIS in its fights on both sides of the border.
Over the past four months, ISIS has shown that it wants to avoid repeating the mistakes that its predecessors made in Iraq.
It has carefully chosen its targets and made sure that the most extreme elements within the movement do not cast Muslim civilians as apostates and thereby try to legitimize killing them.
It has also carried out a soft-power campaign to win the hearts and minds of locals, including children.
