Evony Alliance Castle Demolition: How to Destroy an AC

To demolish an enemy Alliance Castle (AC) in Evony, your alliance must eliminate every defending troop garrisoned inside the structure, then land rapid, continuous attacks to reduce its durability to zero before enemy reinforcements arrive.

Unlike player keeps, an Alliance Castle does not catch fire or burn down automatically over time. It only loses durability points when it receives direct hits while completely empty. If the defending alliance slips even a single troop march inside, incoming attacks register as garrison combat instead of structural demolition, halting all durability burn.

Step 1: Scout and Clear the Castle Garrison

An Alliance Castle holds massive reinforcement capacity determined by its building level and the host alliance's territory research. Defending alliances frequently stack millions of high-tier troops inside, making solo attacks ineffective and costly. Launching solo hits against a reinforced garrison feeds free honor and monarch score to the defender without reducing castle durability.

Before launching an attack, execute the following steps:

1. Scout the structure: Have a player with high-level scouting inspect the AC to identify the defending general on the wall, troop tiers, and troop type distributions.
2. Counter the garrison composition:

• If the defense stacks mounted units and ground meat shields, launch pure ranged rallies backed by sub-city debuffs to wipe out the front line.
• If the defense stacks archer blocks, launch ground rallies to absorb incoming ranged damage and breach the core.

1. Coordinate rally timing: Launch stacked alliance rallies so that subsequent attacks arrive immediately after the primary breach, wiping out any mid-battle reinforcements before they settle.

Step 2: Burn Durability and Block Reinforcements

Once the garrison is completely cleared, the demolition phase begins. Durability must be ground down through constant impacts while preventing the enemy from resetting the attack state.

• Deploy Rapid March Rotations: Send multiple solo marches composed of high-speed cavalry or siege units directly behind the clearing rallies.
• Burn March Speedups: Use speedups on incoming hits to compress the arrival window. Defenders will attempt to send small "trickle" marches of Tier 1 troops to intercept hits; minimizing the gap between your strikes prevents these trickles from landing.
• Keep a Suppression Rally Queued: Maintain a secondary rally locked onto the AC. If the defending alliance manages to land a heavy reinforcement wave, release the suppression rally immediately to clear the building again without giving them time to re-fortify.
• Intercept Repair Marches: Watch for enemy construction marches attempting to repair the structure mid-assault, targeting the sender's keep if they drop their Peace Shield to launch marches.

Alliance Castle Demolition vs. Keep Zeroing

Focusing an alliance assault on an Alliance Castle requires far more coordination than zeroing individual player keeps, but it produces much larger strategic consequences across the map.

When an AC falls, the opposing alliance instantly loses its regional territory perimeter. Connected Alliance Banners lose their integrity, alliance gathering speed buffs deactivate, territory attack bonuses vanish, and structures like the Alliance Super Mine or Warehouse lose their protection.

Step 3: Secure the Perimeter After Demolition

When the Alliance Castle's durability reaches zero, the structure disappears from the map, turning the area into neutral territory.

Do not abandon the coordinates immediately. If the area remains open, enemy leadership can immediately place an Alliance Castle 1 or Alliance Castle 2 foundation on the vacant tiles to start a new construction timer.

To permanently lock down the sector:

1. Place Alliance Banners immediately: Plant your own alliance banners across the cleared footprint to extend your territorial boundary over the disputed grid.
2. Clear orphaned structures: Launch clean-up attacks against any abandoned Alliance Super Mines or auxiliary buildings left within the collapsed zone.
3. Target unshielded keeps: Attack surviving enemy keeps that relied on the AC's defensive territory buffs, forcing them to bubble or teleport away from your new border.