From the Army Management or Travel Menu you can camp. This is a way to sit in place and burn days. If you enter "C10" you will camp for 10 days. If you enter "C" the system will then ask you how many days you wish to camp for. If you have pillaged a fief and you camp in it, you will not auto-pillage it over game reset. If a defending army is in a fief you cannot camp in it until the defending army is defeated. The garrison may resist a camp attempt. You will suffer attrition while camping.