COORDINATED RETREAT

[Demosthenes]

Coordinated retreat is my favorite tactic in siegebattles, both as attacker and defender.
As Defender I sally out every turn, unload my arrows and slingpellets on the enemy and then retreat. This way your enemy might very well lose the taste for a siege.

When attacking it's a good way to decimate your enemy if you field archers of some kind and don't plan on starving. In my roman campaign I took sabaian full-crap-stacked town with only 3 units of scythian riders (and around 10 hippeis).

I'm just tossing ideas here, but what if you siege a town with 1 cavalry unit only, and every turn, when the enemy sallies out, you evade until time runs out. It should be possible to starve any city this way, right?