When is the correct time to activate Fortified Position during a showdown?

Ruling: Fortified Position activates during the Initial Chain, which happens before the main showdown phase. "When you Defend" is an Initial Chain trigger that resolves before players can use Actions.

Sequence:

• Opponent moves their unit to attack, triggering a showdown
• Initial Chain triggers occur: "When I Attack" triggers first, then "When I Defend" triggers (like Fortified Position)
• Initial Chain resolves in reverse order (Fortified Position gives +2 Might to the defending unit)
• Attacker has first Focus and priority to play Actions/Reactions
• Players alternate playing Actions until both pass
• Combat damage is dealt
• Damage is cleared, then attacked/defender tags are cleared

Nuances:

• The attacker always has first Focus during showdown, not the defender
• The attacker also has priority to play Reactions to the Initial Chain