Forts are massive coastal fortifications with dozens of soldiers, mortar batteries, and heavy cannons. Capturing one gives you regional control — reduced pirate hunter spawns, revealed collectibles, and a fast-travel point. Here's the methodical approach.
Phase 1: Naval Bombardment
Before docking, destroy 3-5 defensive towers (cannons + mortars) from the water.
- Start with mortars at max range (~800m). Pummel towers one by one. Towers have poor accuracy at this range, but watch for incoming mortar fire (red water circles).
- Keep moving. Never sit still in fort range.
- Destroy every tower before docking. A single surviving tower fires on you during the landing animation and can kill you.

Phase 2: Entering the Fort
Dock at the marker and disembark through a breach in the outer wall.
- Shoot alarm bells first. As soon as you're inside, use Eagle Vision to locate bells and free-aim shoot them. No bells = no reinforcements even if detected.
- Clear walls first. Gunners on battlements will shoot you while you fight on the ground. Climb up or use sleep/berserk darts.
- Use the environment. Forts are full of gunpowder barrels and explosive crates. A pistol shot to a barrel cluster can clear an entire courtyard.

Phase 3: The Fort Commander
After killing enough defenders, the commander appears (special icon). Tough officer-type with high health, sword-and-pistol.
- Either fight head-on (parry, heavy, repeat) or assassinate stealthily.
- If you cleared the fort quietly, the commander patrols an inner room or battlement. Air assassination is easiest.
- After killing the commander, run to the flagpole and raise the pirate flag to complete capture.

After Capture
Forts generate tax income (collected from harbormaster periodically), provide a fast-travel point, unlock stationed naval contracts, and reduce pirate hunter activity in the region.