Soldiers of God' is a full battle game, utilizing units of between 8-16 models (cavalry is 4-8 models), in either small fast moving Raids, Field Battles (the standard line-up and fight) or Siege Assaults (one sides gets the castle walls to defend, the other attacks it).
It is card-driven, using an action card deck (which will come with the rulebook), to give orders to each of your army's 'Battles'. A 'Battle' is a sub-division of the army, a third of it, either the left, centre or right Battle. These can all act together on the same action card.
The way action cards and Battles interact is governed by your overall Battle Plan, which is a pre-chosen plan of attack (or sometimes defence), which dictates which cards your Battles get for this engagement. These set cards are then added to with random drawn ones, so each game gets an entertaining level of unpredictability, and the cards will never allow a game to be played the same way twice - even if you you used the same forces, over the same terrain, with the same battle plans, the game would still play-out differently.
Picking a force is from one of the two army lists in the game, Crusaders and Saracens, in a familiar way, except the scenario being played adds restrictions to this. So, Raiding forces look very different to castle garrison forces or those deployed for a field battle. Siege Train equipment, ruses and tactics are also available, but only in Siege Assault games.
The rules aren't scale specific, they will be playable at all scales, because the players pick the ground scale and measurements based on their collection and table-size.