ok 1st STOP BUMPING THE THREAD edit your old posts dont make new ones
and second i agree 110% with rask you dont need a 3 story wall to defend your base. A big wall is just a big target it has no purpose outside of medival warfare. let me use this as an example please look below
Say its the year 2525 and the unsc spend all this time and effort transporting enough materials to build a 3 story concrete wall around there temporary colonial hq.
lets skip ahead a week or two now
the covedant invade the planet and slowly push towards the hq
wraith artilery opens fire on the wall from a nice safe distance while the marines cant shoot back
the unsc brings rhinos to fire on the covies but they cant shoot over the walls so they must go outside
the rhinos leave the fortress to get shreaded by the covedants ghosts and banshees witch are fast enough to dodge most of the unsc fire on the wall
the walls crumble the garrisoned marines dieing from either falling, being crushed or inciderated by plasma mortar fire
the covedant sends down a scarab and walks through the breach and destroys the unsc hq
UNSC casualties:over 500
Covedant casualties: less than a 100
now if we were to repeat this same skirmish but with a smaller more cost effective wall.....
The unsc cargo ships would have been supplies more troops and supplies instead of concrete.
The rhinos could have opened fire from inside the base.
The covedant scarab could have been delt with outside the unsc base becuase the troops could get out fast and be adaquatly protected as they enganged it.
And at last the Unsc after finishing operations on the planet can simple pack up and move on without needing to knock down a huge defensive structure.
Edit: this was adressed to commando