Armies have a chance of conducting an automatic raid or pillage if an army camps, or stops at the end of a season (calculated during the daily update). The probability of a raid or pillage depends on the ownership of the fief and the number of days you are in it. This takes place in all circumstances (for sieges, whether armies are in or outside the keep, etc). When an army uses the camp function, the raid/pillage check will have to be run right away. Otherwise, these checks are run over the daily update. The raids and pillages are treated like any other, and reported in the Herald. Percentage probability (anything under 100% is the probability of a raid, anything over 100% indicates an automatic raid and the percentage less 100 the percentage probability of a pillage). Degree of damage depends on days in Fief and ownership (yourself, a king, anyone else.)