(extract from first game description:)
The game series features German units at mostly Platoon and some Company/Battery level and Russian units at Company/Battery level.
Each hex is 330 meters. Turns are 2 hours long during the day and 4 hours at night.
The rules are modeled around the seven battlefield operating systems which make them easily understood and easy to learn but the rules are not massive. This system features extensive use of obstacles, patrol rule, overwatch fire, air and artillery support, and reserve movement.
Obstacles help channel attacks. Overwatch is a type of fire that allows the player to move a short distance and then setup to fire suppressive fire. Reserve movement allows to respond to enemy movement and move more units into a hex to strengthen it before an assault. Units are modeled to represent the 2 major types of weapons that most units have: secondary (usually small arms) and a primary (main gun, machine guns, etc...). Suppression is also handled uniquely in this game: units that are suppressed get a defense bonus.
The game will also force players to account for Command and Control and Supply. Maintenance and repair are critical to both sides as this determines most of the replacements that arrive every morning. Troop replacements are generated by returning casualties to the battle. Lots of these casualties are minor in nature and both sides worked hard to get these wounded back to the front quickly. Air-Ground Attack can have a significant effect on battles.