When you invade Kashyyyk as the CIS or Empire you will probally want to capture the Sea Wall Command Post. The quickest way to do this is to commandeer a tank. Drive up to the wooden barricade and destroy it. Next take the tank and drive around the Sea Wall. To accomplish this simply drive up the hill on either side. Once you are behind the Sea Wall destroy the gate winch. Then blast incoming Republic or Rebel forces. You can also use the tank as a shield against oncoming enemies.