I napalm bomb the steel plating off, then get a high pressure hose and spray acid to dissolve the wall. I then detonate billions of grenades under the wall, which destroy it in it's weakened state. I then nuke it back to the stone age.
uhfirst off napalm makes flame and i doubt its hot enough to melt the steel so it still has it so the acid doesnt do crapto it because the steel is acid proof so it is still max health and since u cant nuke it back to the stone age when its already destroyed. i get in time machine go back to before u attacked it and put up a shield that can only be entered by defenders of the wall and is made of nanomites programmed to destroy everything and anything attempting to damage wall (nanomites are indestructable because they clone themselves when ever one is lose) and only defenders can enter beat that