Perhaps its a completely urban map. That would make sense.
In cities there is a third dimension to care for and even a fourth if you care for sewers!...This is not a 1km square of concrete slab!
Infantry fighting in cities generally turn into a pugilistic form of combat.
This one might be a tough one, in which none of us might see the end of it without multiple respawn!
We will have to
Be ready to be surprised!