Epic of Vaniyera
Current Version: 0.10.8 (April 2017) for Wesnoth 1.12/1.13
The expansionist Lavinian Legion, led by the Imperator himself, has invaded the northern forests of the Sidhe. It is up to the Thunderblade Faolan and his disciple Vaniyera to push its armies back from the border...
Up From Slavery
Current Version: 0.6.1 (December 2012) for Wesnoth 1.10
The year is... Well, the orcs don't know exactly what year it is. They are captives in the imperial city of Lavinium, gladiators performing for the emperor Optus Maximus. All it will take, however, is one orc to lead his people to freedom. The Samnis called Sparxus may be that orc.
Fall of Silvium
Current Version: 0.6.2 (December 2012) for Wesnoth 1.10
You are Caius Regilius, a Tribune of the province Silvia, located in the northmost reaches of the Lavinian Empire. This is the height of the Lavinian Empire - but the Empire has overextended itself. The city of Silvia lies north of the mountains of Arendia, and is sandwiched between the Marauders and the Sidhe... war is inevitable, and the province of Silvia will almost certainly fall.
Alfhelm the Wise
Current Version: 0.6 (4th Nov 2012) for Wesnoth 1.10
This is the tale of Alfhelm, called by some the Wise, son of Alfric the Conqueror. This is the tale of his victories over his enemies, and his rise to power in the clans of Marauderdom. This is the tale of his journey south and his destruction of the Lavinian Empire. And this is the tale of his demise in the dark forests far to the east of his homeland.
Current Version: 0.4.2 (April 2017) for Wesnoth 1.12/1.13
The Thunderblades were forged centuries ago - a monument to the skill of the dwarven craftsmen and the magic of the Sidhe stormlords. But now, Alfhelm the Wise, king of men, travels east, and he desires a new weapon - one that can overpower the legendary swords of the Sidhe. The dwarf Gali will gladly make one for him, for a fair price, but there are some who would object.
If you haven't met the Imperial Era before, or it's been a little while, I encourage you to download "Imperial Era" and these campaigns from the add-ons server and sample these ruthless and lethal factions.