The naval fort in the Castillo de Jagua region is one of the coastal strongholds you can wipe off the map in Assassin’s Creed Black Flag Resynced. Clearing it does more than tidy up your map. It pays out a large sum of Reales, uncovers the surrounding waters, and ticks off progress toward the King of the Castle trophy, which asks you to take over every naval fort in the Caribbean.
Quick answer: Sail the Jackdaw into the fort’s waters, brace against its cannon fire while you knock out its defenses, then seize the stronghold. Capturing it reveals the local map, drops a heavy Reales payout, and advances King of the Castle.
What capturing the fort gives you
Naval forts are the fastest way to fill your coffers early on. Taking one down hands you a chunk of money and pulls back the fog on the map around it, which exposes nearby activities and locations. If you are short on Reales for ship upgrades, forts should be your first target.
The fort also matters for two trophies. King of the Castle requires you to take over every naval fort on the map, so Castillo de Jagua is one entry on that checklist. The cash you earn feeds directly into Ship This, which asks you to buy every hull, weapon, and storage upgrade for the Jackdaw.
Upgrade the Jackdaw before you attack
A stock ship struggles against a fully armed fort. Before you commit to the assault, put your early fort earnings back into hull armor and firepower so you can trade blows without sinking. The stronger the Jackdaw, the shorter the fight.
The Castillo de Jagua region conveniently holds upgrade plans you can grab on the same trip. Two buried treasure maps in the region reward ship parts once you dig them up.
| Map location (Castillo de Jagua) | Reward |
|---|---|
| (298,311), (863,235) — Petite Caverne map | 3,000 Reales + Heavy Shot Storage Ultimate Plan |
| (308,456), (304,310) | 4,000 Reales |
The Heavy Shot Storage Ultimate Plan is one of the twelve Elite plans that turn the Jackdaw into a serious warship, so it is worth clearing before you push on the fort.
How the fort assault works
Note: The combat in Resynced is forgiving, so you do not need flawless play here. A patient run with a decently upgraded ship is enough to take the fort down.
How to confirm the fort is captured
You know the fort is yours when the surrounding map reveals itself and the Reales reward drops into your total. The fort no longer shows as a hostile stronghold, and its entry now counts toward King of the Castle. Repeat the same process at every other coastal fort to finish that trophy.
While you are in the area, the Castillo de Jagua region also contains The Black Trench shipwreck, a reliable spot for forcing random water events and the dive site for the Davy Jones’s Locker trophy. Clearing the fort first makes the whole region safer to explore, so it is a sensible opening move before you chase the rest of the region’s activities.
