This is the second story I came up with...the one I posted previously.
The location in this story is the world of Darion, slightly inside the Core, inside the former border of the Palsan Republic. The Alliance and the Palsan Republic have allied for the purposes of this mission. A Seraphim-class ship, laden with several VIPs, was diverted to Darion, where it was shot from the sky by Shadow defenders. It has crashed inside the ruined city of Ferlis, the former largest city of Darion. There may or may not be survivors, but a rescue mission has been organized. It is a small one by military standards. The objective, obviously, is to find the wreck, get any survivors out, and leave. The safety of these survivors is PARAMOUNT. They must be low on both food and medical supplies. Time is of the essence, so the task force organized-two Avenger-class Alliance walkers, armed with twin pulse repeaters and twin flamers, a Constrictor-class Palsan tank, and an APC containing fifteen men and women. The characters are also members of this force, and are traveling in the Constrictor.
That said, the Shadow has also grasped the significance of the survivors. It too has reinforced its position, and Ferlis was the site of some advanced testing with some new varieties of Shadow undead. It is determined to let neither the survivors, nor the rescuers, leave alive with combat knowledge of these new undead, known as Blood Angels (you can't play one.).
And finally, in the shadows, a small band of yet another group, known as the Fallen, has crept towards Darion. The history of the Fallen is tragic, but suffice it to say that they are a mutant group of Alliance stragglers who have genetically engineered more of their kind. Lurking in small bands across the galaxy, their very existence is unknown to either the Alliance or Palsa, but they bear all other sentient creatures a fierce hatred and are determined to capture the VIPs, though whether to ransom them, question them, or merely kill them is unknown. Their forces and makeup are unknown, but no doubt equal to that of the Alliance/Palsa coalition.