Yes, it's a mini base. The main base is three jumps away on a different continent. This particular base is at the confluence of swamp, meadow, mountain, and black forest, so it's quite valuable for resources.

The ground inside the base is higher than the surrounding ground on several sides, The moat side is too narrow for trolls. There are internal ladders so jumping is not a big strain.

Generally just running around the base when nasties attack is very effective for creating space for fire. On the on side it's possible to simply leap across the gap into the base for quick escape.

Wraiths can get over the walls but not into the internal house even though it has a large gap in the wall. I've not killed "Biomass" so no bats to worry about yet.