Syria is a major player in terms of the immediate area, Israel included, and lets not forget the major gas pipeline issue also, there may be a clue as to why all this kicked off, of course Russia has a part in it, they're the major ally of the country and as you say it gives them operational strategic footprint.
Ironic that you mention the Lithium, Afghanistan has huge deposits, alongside other metals, i don't suppose the yanks and ourselves went to war there for any other reason, do you?