The enemy walker is struck by your own walker's heaviest guns. It rocks and stumbles, and its armoured head is scarred. It doesn't fall over or explode, however. Its head shakes, it crouches down, and then it stands up to its full height. The cockpit swivels over to face you.
Meanwhile, the entire enemy base seems momentarily nonplussed. Soldiers stand still, arms slack, their expressions stunned. The moment doesn't last long. Then the soldiers are running for cover, aiming their weapons, or shouting into commlinks. You have only split seconds to act before the Imperials get their act together.
The landspeeder picks up its soldier and begins to drive roughly towards your AT-ST. Another squad of soldiers has started to take cover near one of the buildings on the West side of the compound. It looks like a temporary prefabricated structure made mostly of plastic.
The sentinels in the north tower quickly begin orienting their heavy repeating blaster in the direction of the AT-ST.
Meanwhile, North of your position, you can hear the sounds of repulsorlift engines becoming much louder and closer. The AT-ST's sensors detect a small speeder headed in your direction.
Everyone may make 1 free Maneuver or action in addition to their regular action this round, due to surprise. Forim already used his extra to open fire. Roll Cool if you haven't already.