You should be able to "pillage" enemy improvements, and this should yield some resources. It's unclear how exactly you would receive the resources: should they be immediately given to the nearest city center, or the city center/encampment of origin of the unit that did the pillaging, or should the unit "carry" the resources until they return to a friendly city center/encampment?
You should be able to "pillage" enemy improvements, and this should yield some resources. It's unclear how exactly you would receive the resources: should they be immediately given to the nearest city center, or the city center/encampment of origin of the unit that did the pillaging, or should the unit "carry" the resources until they return to a friendly city center/encampment?