You will almost certainly deal with a lot of conflict as you raise children adopted from the foster care system. Much of that is because that is what they know, so they are certain to repeat it in your house.
This makes it especially important that you learn to handle conflict in an effective manner, ideally before the trouble hits.
Note that I am not referring to the silly "anger management" classes some teach. I am referring to learning real, practical ways to deal with the conflict you will face. That may even mean pushing it sometimes, but you will need to learn when to stand firm and when to step back for the ultimate betterment of your long range purpose.
Learning good skills in this area is very important!