If I form Germany, do I lose Prussia's cores?
As Brandenburg, I formed Prussia as soon as I was able. Unfortunately, France has become defender of the Catholic faith, so it'll be a while before I can take on Poland to get my remaining cores, and I might be able to form Germany before getting the chance. Will I lose my uncontrolled Prussian cores if I do that?
Solution 1:
No you will not. You will only lose the cores after their timer runs out. You can check this timer by selecting the province you are interested in, then hovering over your shield in the Cores & Claims section.