Europa Universalis IV

Europa Universalis IV

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Chadwbacca Dec 20, 2017 @ 10:49am
I... I... I don't understand how forts work.
I have 700 hours in EU3 Divine Wind, I did the tutorials of EU IV, but, but, they didn't explain this and I don't get it. I was Castille, and I lost Cantabria, Vizcaya and Asturias, after that, my armie in Castilla la Vieja couldn't move to anywhere unless a chose the option to use my... fleet...

Another is that I can't move to other provinces of the enemy until conquer the fortress, but looks like the enemy can move thourgh my fortress, but maybe I'm wrong because I don't understand anything. :D

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Showing 1-15 of 15 comments
Damedius Dec 20, 2017 @ 10:56am 
The forts are like most things in the game. They don't always work against the AI but they often work against the player.

There are many times where the AI will just ignore them though they generally tend to work. They control one province around them in every direction.

If the AI flips one of your forts then you won't be able to travel though the area they control. Every once in awhile some of your armies can ignore the fort but another army you have right there won't be able to ignore it.

They work most of the time but quite often they seem to work against the player. AI ignoring forts, your armies becoming trapped when attacking the enemy and AI having really quick sieges against your forts that somehow manage to finish just a few days before you arrive.
Last edited by Damedius; Dec 20, 2017 @ 2:58pm
Noone does. Not even the devs.
freestyler-rs Dec 20, 2017 @ 2:54pm 
Originally posted by Mr.Batman:
I have 700 hours in EU3 Divine Wind, I did the tutorials of EU IV, but, but, they didn't explain this and I don't get it. I was Castille, and I lost Cantabria, Vizcaya and Asturias, after that, my armie in Castilla la Vieja couldn't move to anywhere unless a chose the option to use my... fleet...

Another is that I can't move to other provinces of the enemy until conquer the fortress, but looks like the enemy can move thourgh my fortress, but maybe I'm wrong because I don't understand anything. :D
https://www.youtube.com/watch?v=x3KqmV_9-bA

The AI cheats a bit though. But this is how it basically works.
Blue Knight™ Dec 20, 2017 @ 8:33pm 
#AiDoesntCheat

but RemanParadox is pretty much the king at explaining forts and other EUIV features
Tasty Bunny Dec 20, 2017 @ 10:29pm 
#AiDoesCheat

AI will ignore fort zoc EVERYTIME when this one condition is met: Alternate route to get to the destination is exist

Since you are Castile, there is one simple hypothesis to understand this AI zoc cowshet

1. Lets say you integrated Aragon and Nafaroaa without lost single province of these two and your own to other nation. And conquered Granada. So you have all provinces belong to Iberia except Portugal.

2. #1 Makes that only route to your territory is just three: One Nafaroaa. Two Roussilon. Three Gibraltar.

3. lets say you have Fort in all that three provinces. Since that three provinces is literally the 'ONLY' route to your hinterland, enemy should not be able to bypass that three fort to enter your territory, unless they do amphibious landing

4. At this point, it actually is. AI can't ignore that three fort just like you, so no AI cheat at this situation.

5. Now, lets say your frog eater cousin France treacherously declared war on you and brought their transport fleet to Cote D' Argent, sea adjacent to Nafaroa.

6. This makes Cote D' Argent an "ALTERNATE ROUTE" since systemically they can move through Cote D' Argent to get Vizcaya or Cantabria from Labourd, Bordo, Saintoga.

7. So, now they can magically move through directly NAFAROA(Ouch!), without sieging down fort. As soon as you drove that transport out of Cote D' Argent, AI again become unable to do this cheat.

8. This rule applies in general.

This is how AI fort zoc cheat works. TBH it's not that hard to prevent this and force AI to abide zoc rule just like player, so know this well
Blue Knight™ Dec 21, 2017 @ 12:23am 
Originally posted by ZenithalLeague:
#AiDoesCheat

AI will ignore fort zoc EVERYTIME when this one condition is met: Alternate route to get to the destination is exist

Since you are Castile, there is one simple hypothesis to understand this AI zoc cowshet

1. Lets say you integrated Aragon and Nafaroaa without lost single province of these two and your own to other nation. And conquered Granada. So you have all provinces belong to Iberia except Portugal.

2. #1 Makes that only route to your territory is just three: One Nafaroaa. Two Roussilon. Three Gibraltar.

3. lets say you have Fort in all that three provinces. Since that three provinces is literally the 'ONLY' route to your hinterland, enemy should not be able to bypass that three fort to enter your territory, unless they do amphibious landing

4. At this point, it actually is. AI can't ignore that three fort just like you, so no AI cheat at this situation.

5. Now, lets say your frog eater cousin France treacherously declared war on you and brought their transport fleet to Cote D' Argent, sea adjacent to Nafaroa.

6. This makes Cote D' Argent an "ALTERNATE ROUTE" since systemically they can move through Cote D' Argent to get Vizcaya or Cantabria from Labourd, Bordo, Saintoga.

7. So, now they can magically move through directly NAFAROA(Ouch!), without sieging down fort. As soon as you drove that transport out of Cote D' Argent, AI again become unable to do this cheat.

8. This rule applies in general.

This is how AI fort zoc cheat works. TBH it's not that hard to prevent this and force AI to abide zoc rule just like player, so know this well
can you PROVE this tho, i can say the ai cheats monarch points because sometimes they beat me in tech, but i cant prove that
Chadwbacca Dec 21, 2017 @ 12:46am 
Ok, now I understand how this mecanich works, more or less. But this still remains illogical to me.

"I was Castille, and I lost Cantabria, Vizcaya and Asturias, after that, my army in Castilla la Vieja couldn't move to anywhere unless a chose the option to use my... fleet... "

¿Why losing three territories in the north (With no fortress) blocked my army in Castilla la Vieja, and my only posibility to move them was to use my fleet INSIDE the Iberian Peninsula?
Margenat Dec 21, 2017 @ 1:52am 
When you have all Spain the ideal forts distribution are Leon + Madrid + Navarra + Rosellon + Barcelona + Valencia + Castilla la Mancha + Granada. This cover all the nation with control zones.

Then Rebels and AI can ignore this zones if there arent other paths.

Forts have 2 essential values:
- Defensivenes: Its a % of how hard is to siege the province, the higher it is the harder it is to conquest. It is affected by ideas, policies, fort level, province terrain, etc... For example a lvl 8 fort with max % could last more than 100 years of siege given certain circunstances.
- Garrison: These are the troops that protect the fort, you need an army 3 times bigger than the garrison to siege any fort. If the garrison is 1k you need 3k, if the garrison is 15k you need 45k to siege.

Forts are lethal in early game, they can deplete manpower really fast ending wars really quickly due to the atrittion-war exhaust cicle.

When you lose troops via battle or atrittion your war exhaust increases and this give you some debuffs, the most important is the penalty to siege. With high WE you cant siege, and thus if you mantain your troops in the fort you will lose manpower due to the atrittion and that will increase the WE. Removing the WE cost dip points so you need to be sure that you can conquer a fort before the siege.

And thats the basics of the forts.
Tasty Bunny Dec 21, 2017 @ 2:26am 
Originally posted by KoA Blue Knight™:
can you PROVE this tho, i can say the ai cheats monarch points because sometimes they beat me in tech, but i cant prove that

That exact scenario actually happened in my game some months ago, but that's kinda tricky to reproduce cuz it's not AI do that intentionally. But since I'm currently playing Japan game, I think I can show off a good case of this ZOC cheat with korea peninsula in a few day. When I manage to do that I'll post it here.
freestyler-rs Dec 21, 2017 @ 7:58am 
Originally posted by KoA Blue Knight™:
Originally posted by ZenithalLeague:
#AiDoesCheat

AI will ignore fort zoc EVERYTIME when this one condition is met: Alternate route to get to the destination is exist

Since you are Castile, there is one simple hypothesis to understand this AI zoc cowshet

1. Lets say you integrated Aragon and Nafaroaa without lost single province of these two and your own to other nation. And conquered Granada. So you have all provinces belong to Iberia except Portugal.

2. #1 Makes that only route to your territory is just three: One Nafaroaa. Two Roussilon. Three Gibraltar.

3. lets say you have Fort in all that three provinces. Since that three provinces is literally the 'ONLY' route to your hinterland, enemy should not be able to bypass that three fort to enter your territory, unless they do amphibious landing

4. At this point, it actually is. AI can't ignore that three fort just like you, so no AI cheat at this situation.

5. Now, lets say your frog eater cousin France treacherously declared war on you and brought their transport fleet to Cote D' Argent, sea adjacent to Nafaroa.

6. This makes Cote D' Argent an "ALTERNATE ROUTE" since systemically they can move through Cote D' Argent to get Vizcaya or Cantabria from Labourd, Bordo, Saintoga.

7. So, now they can magically move through directly NAFAROA(Ouch!), without sieging down fort. As soon as you drove that transport out of Cote D' Argent, AI again become unable to do this cheat.

8. This rule applies in general.

This is how AI fort zoc cheat works. TBH it's not that hard to prevent this and force AI to abide zoc rule just like player, so know this well
can you PROVE this tho, i can say the ai cheats monarch points because sometimes they beat me in tech, but i cant prove that
The AI cheats in various ways. I tested it and it's been proven. My AI allies could get to a fort I could not get to coming from the same direction in the same war at the same time. They can ignore certain zoc rules. Not all, but some. They also cheat with military tradition gained from battles for example.
Kagemin Dec 21, 2017 @ 9:57am 
There was one version where the AI could cheat with zone of control, that has been changed a while ago already. But since the rules for it are pretty complex there still are quite a lot of reports about it.

Reman's video that was linked earlier covers the most common aspect of the rules really well, but you rarely ever need it in such detail. One thing to keep in mind, which screws the ZoCs over for many people, is that both neighbouring forts and forts on your border provinces can work non-intuitively.
Forts work the most predictable if you build them at least one province away from your border and with two provinces between each fort.
Tasty Bunny Dec 21, 2017 @ 10:41am 
Originally posted by Kagemin:
There was one version where the AI could cheat with zone of control, that has been changed a while ago already. But since the rules for it are pretty complex there still are quite a lot of reports about it.

Reman's video that was linked earlier covers the most common aspect of the rules really well, but you rarely ever need it in such detail. One thing to keep in mind, which screws the ZoCs over for many people, is that both neighbouring forts and forts on your border provinces can work non-intuitively.
Forts work the most predictable if you build them at least one province away from your border and with two provinces between each fort.

This is actually intriguing because after I experienced AI cheat on fort ZOC, I never left a hole in my territory so AI should abide zoc rule all the time, but could it be possible they actually fix this and I didn't notice?

Can you point me version that fixed this issue? I couldn't find it
freestyler-rs Dec 21, 2017 @ 10:50am 
Originally posted by Kagemin:
There was one version where the AI could cheat with zone of control, that has been changed a while ago already. But since the rules for it are pretty complex there still are quite a lot of reports about it.

Reman's video that was linked earlier covers the most common aspect of the rules really well, but you rarely ever need it in such detail. One thing to keep in mind, which screws the ZoCs over for many people, is that both neighbouring forts and forts on your border provinces can work non-intuitively.
Forts work the most predictable if you build them at least one province away from your border and with two provinces between each fort.
possibly! I stopped updating my game a while ago.
Kagemin Dec 21, 2017 @ 11:18am 
Not sure which version exactly, should be around 1.19 or 1.20. It was the old "if the AI can reach a province the long way, they may take a shortcut through your provinces".
Chadwbacca Dec 21, 2017 @ 5:38pm 
Well, my conclusion after playing a few wars... I don't like this new fort system. Even after watching the video I still don't know why sometimes I can't go to certain places, but that's not my real problem.

I feel like wars are now... tedious, because you spend most of your time in besieging only the few fortress that you can besiege, and then, you can move to the next fort and so on... and it takes a lot of time to take down forts, even with cannons and good generals (I'm afraid how long would be to siege a level 8 fort), so, 80% of war time is you besieging and praying to don't lost any fortress if the country is big, making the army movement more confusing, and if it has allies is even more chaotic.

I would prefer no movement limitation, and instead of that, if you surpass the zone of control, you get supply penalties. It would be less confusing and more realistic.
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Date Posted: Dec 20, 2017 @ 10:49am
Posts: 15