Civilian deaths from weapons used in the Syrian conflict

Cheap infantry mortar high explosive rounds, artillery cluster shells, armour piercing projectiles, rocket-propelled grenades, multiple rocket launchers, are widespread all over the World and easily trafficable, without being traced.
Rebel militants and terrorist factions can use them from a distance of many kilometres, and destroy entire towns.
$1 billion buys 2,000,000-3,000,000 of such projectiles, enough to destroy an entire Country.
Entirely plastic anti-personnel mines, impossible to trace, are sold for only a few dollars, and can infest vast areas, for decades.
Improvised bombs and mines can even be constructed by cheap industrial explosives.
Expensive laser guided GPS-oriented fancy missiles released from airplanes could be banned from city areas, after International Treaties, but all the rest of the destructive weaponry is still going to be used, unfortunately.