To fully liberate a section of Tsushima in the game 'Ghost of Tsushima,' you'll need to clear out all Mongol camps, occupied farmsteads, and other areas under their control.

Here's how to do it:

1. Find red icons on your map that signify Mongol territory when you hover over them.

2. These icons will be located near farms or settlements in the area.

Once you've found these locations, follow this process for each one:

- Approach the location and engage in combat with any enemies present (Mongols).

- Defeat all enemy forces within range to clear out that specific site from Mongal control.

Keep repeating steps 1 through 4 until every red icon on your map has been eliminated. This will liberate Tsushima island completely, revealing hidden areas containing valuable rewards and items.

Remember: You can't simply walk into a farmstead or camp without engaging in combat first - they're heavily guarded by Mongol forces! Stay stealthy and use your skills wisely to take them down quickly and quietly for maximum effectiveness.

Ghost of tsushima world map