Pavement ants, Tetramorium caespitum, are common in the urban landscape. They rarely invade homes. When the do, call Thrasher Termite & Pest Control to eliminate the problem, otherwise, consider them the great movers of soil. Ants turn over more soil than earthworms.
Some ants, such as the pavement ant, Tetramorium caespitum, is territorial. Near a sidewalk, we caught one Game of Thrones-type ant battle in action. In what must be an ant battle tactic, three worker ants surround and attack another ant. They literally pull the victim limb from limb. Meanwhile other ants seem to encourage the combatants.