Kharkov Battles: Before & After Fall BlauKharkov Battles uses the Fall Blau basic rules to cover the Second & Third Battles of Kharkov. Basics of the system are: Stacking is 3 units per hex and combat out of a hex is restricted. Large units (mainly German divisions and Soviet corps) have Combat Ratings which pull a strength chit for combat. Typically only one unit with a strength chit may combat out of a hex along with all smaller units. Movement and Combat phases with Mobile Assaults for