http://www.avalanchepress.com/ModernSummary.php
a few:
Spotting: Fast mover forward air controllers (FAC) can spot. Dawn/dusk effects on spotting range are set. Counterbattery spotting for efficient units is explained. Vision enhancements like infrared and spotlights are explained.
Stacking: Reduced to 2 combat units + 2 transports normally, but unlimited overstack possible inadvertently with +1 column shifts for each extra unit due to increased target density; only two units can fire out of overstacked hex. There is also some clarification of leaders and stacking. Players may not examine enemy unit stacks except in specific circumstances; i.e., adjacent.
Movement: Air and naval movement added and explained. Format revamped with an expanded section discussing terrain effects; explains tracks, rivers, bridging equipment, all water hexes, gullies, wadis, anti-tank ditches, barbed wire, and dragon’s teeth. Also, helicopter and fast mover movement is detailed, and weather effects are discussed, but most rules remain intact. Some efficient units can move and fire or fire and move, the firing coming with a -1 column shift penalty.
[Rules] Panzer Grendier to Panzer Grenadier (Modern)
