To get us started, here's a copy of part of a PM I sent to Ottoman a couple weeks ago, about the events of the three years before this game starts, and how Constanze got involved with Steitz's Salvation. He said he was going to work this into his blurb on Steitz's Salvation, but I assume he then got too busy.
So in the fall of 1319, the northmen in Rygils had set up a number of walled camps in the region to guard against the long night. The largest of these was in the west end, close to the river and to Modtal. This was their base of operations from which they intended to raid the west bank of the Eider. While the fort itself was on a hill a few miles away from the river, they had a smaller sentry post within sight of the river so that they could watch people coming and going from Modtal. The garrison of Modtal, of course, dismantled the bridge across the Eider so that the northmen couldn't use it.
The northmen's camp on the east bank of the river was circular, ringed by ten-foot palisade and a six-foot ditch. The ditch was lined with wood stakes, and the only access was a plank bridge that accessed a gate on the east side of the fort. When Salvation began attacking the east bank of the Eider, their primary target was to seize this fort so that they could use it for shelter during the long night.
So in 1320, though Salvation was raiding across the frozen river during the winter, they spent March's long night in Modtal. But after that, Salvation rebuilt the bridge and started occupying the east bank in force. They built their own siege camp with a ring of palisade walls around the northmen's camp, and assaulted the fort with ladders and superior numbers. The northmen had run through their winter supplies by this time, and without the opportunity to go out and forage, they were not able to resist for very long. By May, the Salvation had taken control of the fort, and news spread by river and road to Sagard.
The baron sent Constanze to Modtal to make contact with the Salvation's leader and pass along his offer to employ them. Then her orders were to visit the fort east of the Eider and survey the region to determine the remaining strength of the northmen. This task took up the rest of the spring, so that by June's long night, she had to take shelter in the fort. Here, Splinter was of great help, because being a beastman, he could sense when the profane creatures were coming close (seeing them in his dreams) and so he could warn everyone to get to their battle stations well before the attack arrived.
The remaining difficulty, it turned out, was that the northmen were also occupying the ruins of Rygils citadel, and they were dug in much deeper there, having laid traps and ambush points all among the ruins to frustrate attackers. So after sending a letter by river/road back to Sagard, she got orders to carry on helping Salvation to clear the ruins. This required a lot of travel by horse because of the distance between Salvation's fort and where the ruins were, and so that's how Lothar and his men were involved. And Constanze might have been of great help in probing the weak points of the ruins to work out the best way inside. This could have been the "mess" they were in together.
It wasn't until August that we got the last of northmen out of there. By September we had joined up with the Ahran Bull and spent the long night in their siege camp outside Bernholz. By December, Salvation was in Sagard, ready to hear the baron and margrave's plans for the campaign of 1321.
So Dhaeric, if your character is second-in-command of Lothar's cavalry troop, he would have been there for all the parts where Lothar was involved, especially scouting the ruins of Rygils citadel. Keillen, is Kalegen more used to fighting as cavalry or infantry? If infantry, he would more likely have been in the same places that I describe Splinter as being. Because Master Splinter's rat legs are not well suited for riding horses, so he always fights as infantry. With his experience, Kalegen could be commanding 200 men, same as Splinter. But if Kalegen gets on a horse from time to time then he could have also participated in scouting and raiding operations, maybe in a different troop that alternates duty shifts with Lothar's troop?
Another thing not included in the above is that between the fall of 1319 and the spring of 1320 there was an open bounty on northmen caught raiding west of the Eider. Anyone could bring their heads to the baron of Modtal and collect payment (they would be identified as northmen by their beards and haircuts, and in some cases tattoos). This was very effective in stopping the raids. There may have also been a case of someone butchering local peasants and passing them off as northmen to collect easy coin, but if that happened they would get caught within the year when witnesses came forward and demanded justice from the baron, and he would have seen to it that the murderers were hanged.
The year 1321 continued with Salvation patrolling the road to Bernholz/Narkila and protecting the supply lines while the Ahran Bull spend the year laying siege to Narkila. There were threats from bandits and northmen still lurking in the wilderness, plus the northmen were also sending ships along the coast to land raiding parties and try to disrupt the siege, so Salvation's horsemen had to ride out and meet them every time we got word of a ship being spotted. Also in that year, the new baron of Bernholz (appointed by the margrave of Sagsen), was hiring mercenaries to man the city's walls and patrol the streets while he spent the year raising and training fresh troops of his own. So anyone looking for a side gig in 1321 could have found work in Bernholz as a rent-a-cop or a watcher on the wall. This is what one of Lothar's old merc friends, Lucia Schwartzmantel, was doing in that year. Then the baron of Sagard may have also wanted many of Salvation's infantrymen stationed in Sagard to help defend the docks in case northern ships tried to come in and seize the port. He would have his own army for that, but it always helps to have a few hundred extra bodies available to deter an attack.