Defensive Strength at the North Walls is 16; the two attacking strengths are 23 and 21, both above the margun to make the final odds 3:2, with the wall shift cancelled by the dploymnet of armour.
Result: Firefight
Things maybe could have gone very mucvh the Imperial way on a good roll this turn. As it is, bith sides are simply slugging it out. The wall is not breached and the bombardment does not seem to achieve much.
However, one defending Warrior unit is hit and destroyed, another is hit, and the attackers seem to be taking all sorts of casualties. The hit speederbike unit is destroyed, the artillery unit takes a hit, the undamaged trooper unit at (West) takes a hit, and the AT-ST at (West) takes a hit as well.
Meanwhile the Imperials have failed to nominate any units to enter the south of the city and we cannot take any more time... so none do. Good way to waste time that; Rebels will be happy.