[wolverine876]

Ignore them, as much as possible. They are mostly ineffective against insurgencies (unless you kill everyone, which the Russians probably won't do). The only option to defeat insurgencies is with ground forces.

> Another idea is taking out the transports that resupply artillery ammo

Definitely part of insurgent warfare - attack the weak spots. I don't have it in front of me, but one military expert said the soft underbelly of a seige is the outer ring - the outside of the siege.