How do I destroy factions?

[Liebynight]

So I am playing as England and randomdly a bunch of loyal subjects decided to start 3 different factions! How do I dismantle these factions so I can remain in complete control!?!?!

[Dankmaster]

There are a few ways to stop this from happening.
1. Remain powerful( have a huge powerbase of troops so that you can crush any revolt that happens)
You can do this easily by having 2 duchies under your belt.

2. Arrest/revoke! Kill the infant while it's still in it's crib by just arresting and revoking land before the faction gains any real traction.

3.Plotting and murder (If you can, plot to revoke land from them as well)
Murdering the most powerful of the plotters or just the faction head is a good way to make the faction stay under 70%.

4. Be Liked! Literally live to 70 years old and get that 25+ long reign modifier to have that no factions. (or bribe em)