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The mandate of heaven says that it disables all decisions that changes my government type, while the Mongol empire decision says it destroys the mandate if it exists, even if I am the emperor?

That's basically a lie. It disable SOME decisions (people have said prussia gets disabled for instance), while some are not. You can form the MGE tag as the celestial empire, it will permanently eradicate the mandate. And change your gov, but that's incidental.

I'd recommend staying a horde if you plan to go for MGE.
 
Quick question:
Playing as The Papal States, can I join HRE?
The only thing I need to do is to get good relations with Emperor
and add province as ussual?
Or maybe for The Papal States it is not possible?
 
Quick question:
Playing as The Papal States, can I join HRE?
The only thing I need to do is to get good relations with Emperor
and add province as ussual?
Or maybe for The Papal States it is not possible?
Yes you can with good enough relations with Austria, however as soon as the shadow Kingdom happens you will get the choice to either remain or leave the HRE. While all other AI nations will always leave you get to choose.
Staying inside of the HRE will give you this event though:
https://eu4.paradoxwikis.com/Triggered_modifiers#Submission_to_the_Emperor
 
when will the next big patch come where all savegames will be unusable?
The game is semi-decent at exporting, but I find it loses its Ironman Status, and also the Map will look weird. It's always advised to back up your saves and/or not update the game until you're finished playing.

As for when, it's roughly pencilled in at Q1 of 2020, so you've got at least three months or so.
 
As for when, it's roughly pencilled in at Q1 of 2020, so you've got at least three months or so.
I used to think so as well, but seeing how they are moving to monthly DDs now, I suspect that they are still quite far away from release.
 
as castille I could attack genoa who is already at war with austira in an austrian genoan interference war, however I am afraid that as soon as austira finishes its war, that they will instantly back them up in call in all of europe against me.
is there any chance that austria will not accept the CtA after he just fought the same target??
 
as castille I could attack genoa who is already at war with austira in an austrian genoan interference war, however I am afraid that as soon as austira finishes its war, that they will instantly back them up in call in all of europe against me.
is there any chance that austria will not accept the CtA after he just fought the same target??
Depends on opinions/war exhaustion/debt. The foolproof way to avoid him getting involved is:

- Have more than 30% war score by the time the Austrian war ends. Blockades are good for this.
- Have your war last longer than 30 months by the time the Austrian war ends.

If either of these are true, Austria can't join the war.
 
Depends on opinions/war exhaustion/debt. The foolproof way to avoid him getting involved is:

- Have more than 30% war score by the time the Austrian war ends. Blockades are good for this.
- Have your war last longer than 30 months by the time the Austrian war ends.

If either of these are true, Austria can't join the war.
Do these rules apply to Defensive calls too? I thought the 30 month rules was for offensive call to arms.

Another strange thing I just witnessed was that I pulled Portugal in a war against Marrakesh, while attacking his ally England, I tried tieing Portugal in my war for as long as possible and eventually I finished that war due to call for peace.
My initial hope was to prevent England from calling Portugal in against me (because of some rule?) . This worked like a charm as Portugal didn't join immediately, however somehow Portugal was called in after like 5 years of war (and conveniently after I seperate peaced burgundy).
So how do these CtA rules work exactly the wiki is somewhat vague on that.
 
Do these rules apply to Defensive calls too? I thought the 30 month rules was for offensive call to arms.

Another strange thing I just witnessed was that I pulled Portugal in a war against Marrakesh, while attacking his ally England, I tried tieing Portugal in my war for as long as possible and eventually I finished that war due to call for peace.
My initial hope was to prevent England from calling Portugal in against me (because of some rule?) . This worked like a charm as Portugal didn't join immediately, however somehow Portugal was called in after like 5 years of war (and conveniently after I seperate peaced burgundy).
So how do these CtA rules work exactly the wiki is somewhat vague on that.
Defensive calls only follow the warscore rule. It can be 10 years in the war and you can be called in that war. Although you can just white peace out if you're called in that late as the modifier of war duration can tip the willingness.
 
allright thank you.
heres another one the decision to form spain diplomaticly tells me that aragon must not have more than 37 cities, is that a set number? because wiki says 32 cities.
is there some math behind that? has this to do with development?
is the 37th city included meaning that 37 cities are OK and 38 one too many?
 
allright thank you.
heres another one the decision to form spain diplomaticly tells me that aragon must not have more than 37 cities, is that a set number? because wiki says 32 cities.
is there some math behind that? has this to do with development?
is the 37th city included meaning that 37 cities are OK and 38 one too many?
The logic behind that is the number of provinces Aragon and Naples starts with, it accounts for the Iberian Wedding happening after Aragon integrates Naples.

32 is out of date, when Aragon got more provinces in 1.28, it was raised to 37 to take it into account.
 
as castille I could attack genoa who is already at war with austira in an austrian genoan interference war, however I am afraid that as soon as austira finishes its war, that they will instantly back them up in call in all of europe against me.
is there any chance that austria will not accept the CtA after he just fought the same target??

I guess that Genoa is still part of the HRE, and Austria is Emperor. It seems to me that in this case, Austria can enter the war as Emperor only at start. It is the same for guarantees, defender of the faith and overlord of tributary, the attacked country can not call them to arms, but they will enter the war automatically at start. So if you can start the war without Austria being called, you're safe even if Austria ends its war vs Genoa just after.

At least it works like that in my experience and I never saw the Emperor/guaranteer/tributary overlord/defender of the faith enter a war already started since some time by me.

Another thing that is good for you is that the HRE Emperor may not defend HRE members that are its rivals and other enemies, so he may have enough bad opinion of Genoa to not accept its CtA even without being at war with it.

Last advice: if Genoa is still part of the HRE, and you have no permanent claim on its province, taking land in Italy will give very high AE. Basically North Italy is the place in the world where you can gather a coalition against you the more easily in my own experience. So if you have already some AE in Catholic countries, be very careful for this.
 
Does enforce culture on a subject really work? I've never had any luck with it working....
I've used enforce religion a lot and usually convert the subjects provinces for it....