[quote=@supertinyking]

Setting: Dark Heavy fantasy. Low tech level, their highest tech is battering rams, for military tech.

[/quote]

Hey, sorry but this stuck out for me. 

A battering ram could literally be a log used to bash down the gate. If you meant the actual engineered thing with wheels and such, then that is different. However, if siege engineering is a thing then obviously they'd have access to at least catapults, but possibly Trebuchet which were far more advanced for the dark age siege weaponry. That would make it more fantasy because otherwise you'd date that world to pre-Roman, possibly pre-Ancient Greece, which means you'll miss out on steel smithing, armor advancement, and so on.

But you might have been going for that, in which case, carry on.