If you play Surprise Defense at Fortified Position, do you get the battlefield trigger the first time you become a defender there?

Ruling: No, you do not get the trigger. The battlefield needs a player to control it to have a valid understanding of "you" in its text, so Surprise Defense does not trigger battlefield abilities that reference "you."

Nuances:

• This represents a change from previous rules where Reaver's Row did work with Surprise Defense
• Battlefields with "you hold" and "you conquer" text are not drastically changed by the new rules clarification