What does Stalwart Defense do in the War Tactics tree?

Stalwart Defense reduces the damage you take from non-player (PvE) targets:

• Effect: −1.5%/level.

It's the defensive mirror of Relentless Assault. Global (all types), it applies in every PvE fight.

Why it counts: the attrition math shows an army loses ~300-600 troops per round against a full defender. Less damage taken = your troops last longer, you get more rounds in before retreating, and you melt more of the enemy before having to send the next wave.

➡️ Level it alongside Relentless Assault for an effective offense/defense pair in PvE farming.