Introduction

Black Desert Online Siege War Guide will help you quickly establish a strong foundation for your journey. Let’s dive in and get you on the right track!
Welcome, brave adventurer, to the ultimate guide to conquering the battlegrounds of Black Desert Mobile‘s Siege War! This grand conflict pits guilds against each other in a thrilling contest for control over the esteemed castles of Calpheon and Valencia. Participating in Siege War is not merely about brute force; it demands strategic planning, seamless coordination, and a deep understanding of the battlefield. This guide will walk you through every facet of this pivotal guild content, ensuring you and your comrades are well-prepared to etch your names into the annals of Black Desert Mobile history.
Bidding Process

Your journey to castle dominion begins with the bidding process. To even throw your guild’s hat into the ring, your collective must have reached at least level 5 and proudly control a Node of level 2 or higher. Furthermore, at the moment of bidding, at least ten members of your guild must stand ready to fight alongside you.

The bidding itself is conducted through the Siege Gateway, accessible from your Guild Fortress. It’s a matter of guild funds, with the top three most generous guilds securing a coveted spot in the upcoming Siege War.
Keep in mind that the bidding system automatically assigns you to either the Calpheon or Valencia conflict. Victory in this initial financial skirmish comes at a cost, however, as any Nodes your guild currently holds will be relinquished upon a successful bid. Finally, remember that simply winning the bid isn’t enough; at least ten of your guildmates must actively participate in the Siege War itself, lest you face a week-long ban from future bidding.
Preparation Phase
Once your guild has secured its place in the Siege War, the preparation phase commences. This crucial ten-hour window, running from 10:00 to 20:00 server time on Saturday, is your opportunity to fortify your positions and strategize for the impending clash.
Reinforcement
One key aspect of preparation is reinforcement. By expending valuable Camp Resources, both attackers and defenders can bolster their key structures up to level 10. Attackers will focus on upgrading their Guard Tower, Barricade, and Holy Artifact, while defenders will reinforce their Gate Sentry, Guard Tower, and Holy Artifact.
Siege Weapons

Another vital element of preparation involves siege weapons. Remember that the heat of battle is no time for crafting or upgrading these instruments of war; all preparations must be completed beforehand.

Your Guild Fortress offers the means to acquire these powerful assets, with Cannons being crafted in the Armory and formidable Elephants and Ogres being purchased from the Den. It’s essential to understand the limitations: attackers have access to one Ogre, one Elephant, and three Cannons, while defenders can deploy one Elephant and three Cannons.

Attackers also possess a unique weapon: the Judgment of Aal. This two-person siege engine, requiring a driver and a gunner, offers both mobility and firepower. The driver can accelerate, leaving behind trails that hinder enemy movement, while the gunner can precisely aim the cannon. Notably, those mounted on the Judgment of Aal are temporarily invincible. This weapon evolves with each failed siege, growing stronger up to level 6, and its power also increases based on the combined CP rank of the attacking adventurers each day, reaching up to level 10 through enemy adventurer kills.
However, its enhancements from failed sieges reset upon a successful siege using it, and it can only be redeployed five minutes after being destroyed. Importantly, the Judgment of Aal is exclusive to attacking guilds and cannot be used by the initially defending guild even if roles are swapped.
Guild Skills

Guild Skills also play a role in Siege War, though their management primarily occurs during the battle itself. Only Guild Masters and Officers can activate these skills, and the “Call to Battle” skill can be leveled up even during the Siege War, with its enhanced effects applying immediately.
Deploying Your Guild Members

Finally, the preparation phase involves the critical task of deploying your guild members. The Guild Master or Officers must strategically assign roles and positions to your forces. Remember, any member who joined the guild within the last seven days will be ineligible to participate. While it’s possible to reassign members during the war, doing so will return them to the Guild Fortress, requiring them to re-enter the fray.
The deployment screen allows you to position up to 50 members in the Main Castle and a maximum of 5 in each of the East, West, and South Towers. Pay close attention here, as the “Confirm Deployment” button can mistakenly remove all your deployed members, potentially crippling your initial strategy. Exercise extreme caution.
Siege War Battle

As the clock strikes 20:00, the Siege War battle erupts. The conflict typically involves one defending guild and two attacking guilds. The defending guild begins with control of the castle, either by having successfully captured or defended it in a prior siege. If no guild currently holds the castle, one of the participating guilds will be randomly chosen to defend. The two attacking guilds, selected through the bidding process, will then strive to breach the castle’s defenses.
Victory Conditions

Victory in Siege War can be achieved in several ways. For the attacking guilds, the primary objective is to destroy the defending guild’s Holy Artifact. For the defending guild, success lies in either safeguarding their Holy Artifact for a full hour, or by managing to destroy the Holy Artifacts of both attacking guilds. Additionally, if the intense battle stretches until the 21:30 mark, the guild that is currently defending at that time will be declared the victor.
Role Swap
A dynamic element of Siege War is the potential for an attacker and defender role swap. Should an attacking guild manage to obliterate the defender’s Holy Artifact, the roles will immediately reverse. The triumphant attackers will become the new defenders, while the previously defending guild will now join the ranks of the attackers. The time it took to destroy the initial Holy Artifact then becomes the new defense time limit for the newly instated defenders.
This cycle of attack and defense continues with each Holy Artifact destruction. However, if an artifact is destroyed in under ten minutes, the subsequent round becomes the final, decisive ten-minute showdown. It’s important to note that after a role swap, all participating guild members are moved back to their respective starting Nodes, and any siege weapons in the process of being summoned are canceled, though they can be summoned again.
Siege Weapons and Border Battle

Throughout the battle, the effective deployment of siege weapons is paramount. Attackers should aim to deploy their Ogres and Elephants early in the assault to break through the initial outer defenses. Cannons, with their long range, are best utilized once breaches in the gates have been made, allowing them to target the Holy Artifact from a safer distance. If a guild swap occurs while a siege weapon is being summoned, the process will be interrupted, but the weapon will be available for re-summoning unless it was already destroyed.
Border Battle Towers

Beyond the main castle, the Border Battle introduces three crucial secondary locations, each containing a Tower that guilds will fiercely contest. These locations can accommodate up to five guild members each, and the guild that lands the final blow on a Tower claims its unique bonus until an enemy guild manages to destroy it.
- East Border Tower: Provides Hwacha Bombardment Support on the Main Castle, raining down damage on enemy characters and defenses, though it cannot directly target the Holy Artifact.
- West Border Tower: Offers powerful Cannon Bombardment Support, dealing significant damage and inflicting knockdown on random enemy characters within the combat area, but it too cannot harm the Holy Artifact.
- South Border Tower: Presents a different objective: the Battle-Hardened Ogre. The guild that delivers the final blow to this formidable beast gains a powerful buff, which increases AP and DP, and boosts structure damage. These buffs stack up to five times.
Managing these Border Towers often falls to designated Leaders and Officers who can redirect guild members as the situation demands. A common offensive strategy involves a small, coordinated team rapidly cycling through these towers to capture the bonuses and deny them to the enemy, maximizing the uptime of these crucial advantages for their guild.
Defensive Tactics

For the defending guild, a powerful tactical option lies in the ability to destroy bridges and barricades, which can significantly hinder the attackers’ advance. The Guild Master can use guild funds to destroy either a bridge or a barricade, though both cannot be destroyed at the same time. Once the destruction is initiated, there is a 30-second delay before the blast occurs, during which any players and siege weapons in the area are instantly destroyed. The structure remains destroyed for ten minutes, preventing attackers from using that route.
However, this ability has a cooldown period of ten minutes after use, so timing is crucial. If used strategically, it can force attackers to seek alternative, often longer routes, disrupting their momentum. This is especially effective against large siege weapons like Elephants and Ogres, which rely on these paths to advance. By carefully timing the destruction of key routes, defenders can buy themselves valuable time and force attackers to rethink their strategy, potentially stalling the assault and buying time for reinforcements or counterattacks.
Character Respawn Points
The flow of battle in Siege War is not solely determined by the clash of forces and the strength of siege weapons; it is also significantly influenced by the dynamic nature of character respawn points, which shift as the castle gates change status throughout the siege. At the beginning of the battle, when all the gates are intact, the respawn points are relatively simple: attacking guild members are able to respawn near their Holy Artifact, giving them a strategic position to launch further assaults.

Meanwhile, defenders have more flexibility, as they can respawn either at their Holy Artifact, which is central to their defense, or at one of the Outer Gates, depending on their proximity to the action and the needs of the battle at any given moment.
However, as the siege progresses and gates begin to fall, the respawn points become more complex and can dramatically affect the flow of the battle. For attackers, the destruction of gates creates new opportunities for them to respawn closer to the action, with breached gates becoming new respawn points. This shift is crucial, as it allows attackers to maintain pressure on the defenders and push deeper into the castle. The more gates that attackers manage to breach, the more they limit the defenders’ options and gain an advantage in reinforcing their assault, particularly when they begin to respawn directly at the front lines or near critical areas like the Holy Artifact.
On the other hand, the defenders face significant challenges as their respawn points are progressively restricted when the gates fall. Losing an outer gate not only weakens the defenders’ ability to control the perimeter but also limits their respawn points. As the attackers gain access to previously fortified positions, the defenders are forced to fall back to fewer and fewer options, which can lead to disorganization and difficulty in reinforcing key defensive points. The closer the attackers get to the Holy Artifact, the more difficult it becomes for defenders to respond quickly, as they are pushed back to more distant respawn points, forcing them to fight in increasingly unfavorable positions.
The ability to manage respawn points effectively is one of the subtle but decisive factors in Siege War. Attackers must leverage their new respawn opportunities strategically, using them to pressure key areas of the castle and deny defenders the ability to regroup effectively. Meanwhile, defenders must be aware of the changing respawn dynamics and be prepared to reposition their forces accordingly, ensuring they maintain access to critical respawn points to keep up the defense.
As the siege evolves, the shifting respawn points become a key tactical element, influencing where battles are fought, which players are able to get back into the action quickly, and how both sides can reinforce or disrupt their strategies. Mastering the ebb and flow of these respawn mechanics is essential for maintaining an advantage and ultimately achieving victory in Siege War. It adds another layer of depth to the already complex battle, where every decision, every moment, and every gate can alter the course of the conflict.
Offensive Strategies

To truly dominate the Siege War battlefield, a guild must master offensive strategies. A strong initial push is often key. Immediately summoning your Ogre and Elephant at the start can allow them to cross the bridge even if the defenders attempt to destroy it early. Follow up by deploying your cannons once your larger siege weapons have secured a path. Controlling the Border Towers is crucial for gaining significant combat advantages. A small, dedicated team should rotate through these locations, capturing the buffs and hindering the enemy’s access to them.
In the later stages of the siege, consider employing the “death ball” strategy, which involves a coordinated full retreat of your offensive forces, allowing any remaining defenders to focus on the other attacking guild. Simultaneously, prepare your strongest siege weapons and have all guild members ready. Then, in a synchronized surge, your entire guild crashes into the enemy Holy Artifact, overwhelming any remaining defenders and securing the decisive last hit.
Conclusion
In the world of Siege War, success depends on more than just individual skill; it requires flawless communication, precise coordination, and a deep understanding of the mechanics that govern the battlefield. Leaders, whether Guild Masters or Officers, must be able to make rapid decisions under pressure, guiding their guilds with clear strategies and tactical awareness. It’s not enough to merely have a group of powerful players – they must work together as a well-oiled machine, each member knowing their role and executing it to perfection.
Mastering the offensive and defensive strategies detailed in this guide is just the beginning. Understanding how to manage the siege weapons, control the Border Towers, and handle the ebb and flow of battle will give your guild a critical edge. Equally important is the need to adapt to the changing circumstances of the siege, whether it’s adjusting your tactics in response to a role swap or quickly regrouping after a failed attack. Every decision, every move, and every command can tilt the scales of battle.
Through meticulous planning, seamless coordination, and effective execution, your guild can rise above the competition, claiming victory and conquering the castles of Calpheon and Valencia. The rewards of success are not just material, but also an everlasting legacy, as your guild’s name will be etched in the annals of Black Desert Mobile’s history. Siege War is not just a contest of strength, but of wit, teamwork, and strategy.
As you march into battle, remember that while victory is never guaranteed, it is always within your reach with the right preparation and mindset. Whether you’re defending your castle or leading the charge as an attacker, your guild’s success hinges on the unity and determination of your members. So, gather your forces, communicate your plans clearly, and execute your strategies with precision. Good luck, and may your sieges be victorious as you write your own story of conquest in the ever-changing world of Black Desert Mobile.
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