Calradia at War (Custom Spawns)
One of the largest vanilla expansion mods and tools. 21+ new factions, custom C# systems such as spawning, AI, dialogue, rewards, diplomacy, and more! Hundreds of new units, campaign spawns, troop trees, campaign events, etc. Modular enough to act as an API for other mods, allowing for easy XML modding that is not possible with the base game.