When using Relentless Pursuit to move a unit from base to an occupied battlefield during opponent's turn, what is the sequence of resolution and who becomes attacker/defender?

Ruling: When you play Relentless Pursuit to move your unit to a battlefield the opponent is conquering, it triggers a Surprise Defense. The uncontested showdown resolves first (resulting in no point scored), then the Surprise Defense showdown occurs with the opponent as attacker and you as defender. The winner takes control of the battlefield and scores a point.

Sequence:

• Opponent moves to conquer a battlefield
• You play Relentless Pursuit to move your unit to that occupied battlefield
• This triggers Surprise Defense
• The uncontested showdown resolves first (no point scored)
• Surprise Defense showdown occurs
• Opponent remains the attacker, you are the defender
• Winner of the showdown takes control of the battlefield and scores a point