My next target for OCMOD3 is formation stacking and attack compression of units. First we need definitions and explanations. 1. Formation stacking - Occurs when the player moves two or more formations onto the one piece of terrain. The result is a very compressed line, column or square with more than one formation in it. In reality, formation stacking would be impossible. Formations in close order already place men as close to each other as they can be and still use their weapons effectively. That is they must have basic elbow room to use weapons and basic stride room to move without tripping up each other. Another close order formation cannot stack on or within an existing close order formation in the real world in the era in question. Apart from realism "requirements", formation stacking ruins the game anyway (IMHO). It prevents proper disposition of formations and use of tactics. 2. Attack Compression - Occurs when the attack command is used on enemy units (except in State vs. Country where this fault is corrected). Also occurs in general attacks under certain conditions. The player might not give an explicit order that leads to compression but the game conditions and game engine "decisions" lead to it. We need to be able to define unit space ("elbow room") in such a way that these problems cannot occur. At the same time we do not want to cause movement problems or hangups on obstacles. Does anyone have any ideas at this stage? If only formation spacing stayed constant under movement and battle pressures. This would mean formations could deform (stream out for example) but never compress more than the standard "at ease" formation spacing. What sets this spacing? Why do movement and attack compress this spacing (to almost nothing sometimes)? First thoughts anyone?