One of the key issues in the Syrian conflict over the past two years has been the supply of weaponry to both sides, which has kept the fighting going.
The government has been able to rely on a steady flow of arms from its foreign allies, while the rebels have received weapons and non-lethal aid in a more clandestine way. Here is a look at where the military support is coming from.
Here is a look at where the military support is coming from.