Union Operation (連合作戦) or Allied Operation on Global, or Combined Operation or commonly known as World Raid, is another variation of Raid where teachers all around the world work together to defeat the Union Operation Boss in Blue Archive.
It can be unlocked after clearing Mission 2 Act 3.
General Information
Note: The following is a gist of Union Operation. However, the rules may change depending on the union event. Please check on the respective union event for more information.
Union Operation Boss
In Union Operation, the Union Operation Boss has a Global HP bar which will be deducted for every damage dealt by teachers everywhere. The Boss' HP is connected directly with the "Union Operation Boss. Thus any damage dealt is to be directed toward it. When the boss's HP reaches 0, a "Decisive Battle" will occur in which:
- No ticket will be required to enter.
- Teachers will obtain
PyroxeneCategory:test upon completing the battle. - Teachers will obtain even more PyroxeneCategory:test and
Ultimate Skill BookCategory:test upon completing the "Boss Complete Destruction"'.
Boss
There are 3 difficulties tied with the Boss (A, B, and C), and entering it will consume 1 Union Operation Ticket. Each difficulty will have its own HP and stats. Similar to Total War, should teachers fail to defeat the boss or within the time limit, its HP will be carried over to the next run and teachers will need to use another ticket to continue.
Should teachers decides to battle a different difficulty while having another difficulty active, they are free to do so.
- Example:
If teachers are battling difficulty A halfway and decide to battle difficulty B on the next round, the remaining HP of difficulty A will remain until defeated.
Certain things to noted
- Tickets
- 1 Union Operation Ticket will replenish every 3 hours and it is possible to store up to 10 tickets over time.
- Union Operation Ticket can also be exchanged using Pyroxene and it can be exchanged up to 5 times a day.
- Union Operation Ticket will not be refunded for forfeiting.
- Friend Assists
- Teachers can borrow a student from another teacher.
- Assist function resets at 04:00 JST daily.
- Others
- Teachers can perform a mock battle first to understand the boss and create a strategy
- Unlike Total War, teachers cannot rush (Sweep) the battle.
- Upon clearing the Boss Complete Destruction, teachers will have to click on the "Boss Complete Destruction Reward" on the Union Operation Lobby to actually receive it so teachers should make sure they do not forget about it.
Operation List
| Abydos Resort Restoration Committee 「アビドスリゾート復旧対策委員会」 | ||
|
Boss | Wakamo |
| Terrain |  Indoor IconCategory:test
| |
| Event Period | June 22nd, 2022 11:00 JST ~ July 15th, 2022 04:00 JST | |
| Rewards Period | June 22nd, 2022 11:00 JST ~ July 22nd, 2022 04:00 JST | |
| Notes | Event occurred within Abydos Resort Restoration Committee | |
| F.SCT Strategic Battle (False Sanctum Tower Strategic Battle) 「F.SCT攻略戦」 | ||
|
Boss | Binah, Shiro and Kuro, Chesed, Hieronymus, Hod and Perorodzilla |
| Terrain | Multiple Terrains | |
| Event Period | January 24th, 2023 AT Main JST ~ February 22nd, 2023 11:00 JST | |
| Rewards Period | N/A JST ~ N/A JST | |
| Notes | Event occurred within Main Story Final Chapter | |
| PHT Decisive Battle 「PHT決戦」 | ||
|
Boss | Shiroko Terror |
| Terrain | Indoor IconCategory:test
| |
| Event Period | March 08th, 2023 AT Main JST ~ March 22nd, 2023 11:00 JST | |
| Rewards Period | N/A JST ~ N/A JST | |
| Notes | Event occurred within Main Story Final Chapter | |
Trivia
- As of 2025, There are still no new Union Operation available, however there is a possibility some of the Volumes may get it soon.
- In 2026 (January 20th), it is also revealed that Decagrammaton is also getting the Union Operation, but under in a Boss Rush type of Operation.
- Global also got the same Union Operation in May 26, but this time it is "Globally" (Pun intended) for EU,NA,ASIA, TW and KR.
Credits
- Information taken from Official JP Site and Noxy from Discord.