First, to siege a province, you need more troops than the garrison. Then, each siege tick you roll a d14. You add siege status, breach bonus, leader bonus, arty bonus, port bonus to this roll. If you reach a high enough value, you will win the siege.

How long do sieges take eu4?

Each phase is 30 days, but modifiers to the length can apply (Local Defensiveness and Siege Ability for example). You have a die rolled each phase, which is added to the sum of the modifiers for the siege which go as such.

How do you use territory in Europa Universalis 4?

Once you're happy with the results of the war you're in, click on the country you want to take land from, sue for peace, and ask them for the provinces you want to take. Once you've taken provinces in a peace deal, the stripes go away, it becomes your colour, and you can mismanage it as you please.