Dwarves and their underground cities and the vast network of tunnels that connect them, a stereotype older than Tolkien. What I wonder is how would warfare be waged in this tightly restricted area?
Say there are two sides, one which is numerically superior,the rebels, by a wide margin but has little in the way of training, armor, and melee weapons but does have access to muskets and explosives to combat the other side, the nobles, which do have access to trained and capable infantry that are heavily armored and armed but opposed to the use of muskets for their limited use underground and explosives for the risk of damaging tunnels and vital infrastructure. The rebels have an interest in taking over the nation and ousting the nobles by either exile or execution. Now specifically how would warfare be waged with as little damage done to infrastructures such as tunnels, ventilation shafts, and the pipes that carry water and air throughout the nation? This infrastructure is much more expensive to replace than maintain and the rebels wish to keep as much infrastructure intact as possible because of their interest in running the place after the nobles are defeated.
With this in mind, what strategies could each side employ to either quell the rebellion or oust the nobles with as little damage to infrastructure as possible?
EDIT: Time to clarify how the cities actually are designed and what they look like. and maybe one little fact about my dwarves.
There are multiple cities of various size and their size is three dimensional with multiple tiers and levels instead of being based on a flat plane. An answer immediately resonated to me how best to describe the cities and that would be as geofronts are rather hollowed cavities in the earth. The houses are built out towards the outer edge of the geofront in the form of terraces. There are also large cylindrical walls spaced out in front of the outer edges in which more houses are built in a terraced fashion and there are also streets held by stone pillars which also interconnect them. Think of an onion that has many layers and the area in between these layers act as streets. the closer to the center you get, the wealthier the occupants.
Now onto the tunnels that interconnect these cities. If you've ever played Dragon Age you can get a good idea if you imagine the deep roads. However, unlike the deep roads, these tunnels don't have magma flowing their length on either side and they aren't infested with darkspawn. These tunnels are also shorter and slightly wider and the support pillars are placed in the center and in front of each of these pillars are large illuminating crystals encased in glass that act as giant lanterns which solve the problem of lighting. The tunnels act as a sort of highway between the cities. The dwarves also have manually powered vehicles like bicycles which are used in place of horse-drawn carts which would be the main transportation of goods across cities. little fun fact, the dwarves also have bike races across the length between two cities for rewards of gold and recognition from the public to distract them from their very boring lives.
Now how about the air. Air is pumped in from the surface into large pipes that sprawl throughout the nation, delivering air to the dwarves who live underground. Additionally, water is also pumped from aquifers into a different set of pipes which supplies water to the nation. There are also some cities on the surface which cultivate crops which are brought down to the cities in addition to food imported from trade with humans.
The cities on the surface are a fair bit smaller than those below ground and are where the air is pumped in from. These surface cities are built outside of an entrance to one of the subterranean cities and outside of these surface cities are where crops and animals are cultivated.
I hope this gives a much better idea of the dwarven civilization in my world.