Complex sentence: These teams empathizes in covert arrests, usually in crowded areas full of civilians, but if the urban area is to destabilized, then they do overt arrests, often in full battle gear.
Split into simpler sentences: These teams empathizes in covert arrests, usually in crowded areas full of civilians. If, though, it is deemed that the urban area is too destabilized, then they do overt arrests, often in full battle gear.