Garrisoning (Tiberium)

Garrisoning is a tactic used in urban combat. As high ground and cover are both effective measures to protect infantry, commanders often choose to send their troops inside buildings whenever possible, vastly increasing their survivability. A trained group of infantry can easily turn a civilian structure into a makeshift fortress, keeping them safe, at least as long as the structure stands. It's generally considered safe to garrison two or three squads inside one building, as more might increase the chance of accident. The garrison structure can't be repaired though and takes permanent damage. Heavy vehicles like Mammoth Tanks can take alot of damage but dishes out severe damage to the structure before dying to anti-tank units inside the structure.

However, there are a variety of counters to this tactic. GDI trains it's Grenadier squads exceptionally well; they are capable of killing any infantry squad that garrisons itself by lobbing grenades through the windows. Similarly, Nod's Flame Tanks and Black Hand Troopers are well trained in urban combat scenarios, and their flamethrowers can quickly burn up the oxegyn inside a confined building, suffocating those inside. During the Scrin invasion, Buzzers have been known to enter structures and shred troops holed up inside. Corrupters can flood the structure with Tiberium sludge and kill the troopers inside. Also, massive damage to the building will force the infantry out of hiding to avoid dying in a structural collapse.