Syria was flying its jets over Syrian sovereign territory, moving to attack Al Qaeda jihadists (aka "moderate rebels") operating illegally in Syrian territory, and backed up by US forces, which have set up operations illegally within Syrian sovereign territory.
We pointed out that...
The US has not been invited by the internationally recognized government of Syria to fight ISIS on Syrian land, and as such the United States has de-facto invaded and occupied Eastern Syria.America's plan to divide Syria into an Eastern Sunni/Jihadist state and a Western secular nation is taking hold, as American forces have vowed to protect "coalition" partners (aka Kurdish forces and Al Qaeda proxy armies) occupying large swaths of lands in a sovereign Syria. It is nothing more than an illegal occupation under the protection of the United States military.
To make matters worse, the US is supporting Al Qaeda terrorists as a foot soldier proxy army, in order to secure as much of Eastern Syria as possible, and create a rump state Syria, effectively dividing the once united country.
Russia responded to the US aggression by saying its surface-to-air missile systems in Syria would begin to track manned and unmanned aircraft from the US coalition if they move west of the Euphrates River.













Comment: No matter what the US does or doesn't do in Syria, what happens is directed by the nation that has its 'hand' within the 'glove.'