Fort battles

[flyingpaperplane]

How many for cannons should I take down? San Jose e.g. and should I take different angles to fire at the fort?

[StormRangerX]

It depends on difficulty but ballpark you'll need to destroy at least half of the cannons of the fort to suppress it. You will need to maneuver around as the cannons are all across the fort.

[GqM]

Originally posted by flyingpaperplane:

How many for cannons should I take down? San Jose e.g. and should I take different angles to fire at the fort?

These are the rough estimates of % of guns remaining after breaching a fort, separated by difficulty:
Easy - Normal: Probably 45 - 50-ish%
Hard: ~45%
Very Hard: ~30%
Impossible: 13 - 15%

You can start from the direction from where the wind is coming from, destroy the guns, then move downwind.

EDIT (again):
Found this in the Russian guide, not sure if it's accurate because I've had a different experience but anyway...

The number of fort cannons in the cities you will have to destroy depends on the difficulty level you choose.
So, for the difficulty level of the game:

1. Easy – 37%
2. Normal – 43%
3. Hard – 52%
4. Very Hard – 65%
5. Impossible – 86%

* This percentage is relevant for all cities, except for Fort Tortuga,
where it is higher (the possible reason for this is probably the quest “Turtle Soup”?)!