Any regiments or artillery that are forced to retreat from a ZOC by CRT results, fail a cohesion check, or cavalry that has charged; become disorganized and are marked with a D marker the color of their side (The Cavalry charged marker is considered the same as a D marker).
Individual units become disorganized, but cause their entire stack to be disorganized, and one D marker marks a stack. If a unit leaves the stack, it, and the stack it left, remain disorganized and each should have a D marker.
If a disorganized unit joins a stack, all the units of the stack become disorganized. If a unit joins a disorganized stack it becomes disorganized as well. Changing the contents of a stack never removes disorganization. A unit that moves through a stack does not become disorganized or cause the stack to become disorganized.A stack that is disorganized and is forced to retreat looses a unit and the remaining units remain disorganized.
During the Reorganization Phase the phasing player rolls one die for each of his stacks with a D marker (or charged marker). The marker is removed on a die roll equal or less than the cohesion rating of the lowest rated unit in the stack. A commander in range may affect the reorganization die roll (see 19. Commanders) by rolling his command value or less. A 1 is added to the roll if there are no friendly, non-disorganized units adjacent to the checking stack
