Your order the sentries to signal the raiders to ride westwards and help the reinforcements before its too late!
6 auugh!
The Cataphracts must've been too occupied by the reinforcements from Luathbas, because they did not see your raiders incoming! The mighty, armored, fearsome Parsian cavalry was taken in a pincer attack and even against that their prized unit cannot fight well.
The Cataphracts are decimated and sent running! This also causes the Parsians encamped around Abur to abandon their posts and flee in chaos!!
By the afternoon your raiders, alongside the reinforcements, with only some of them wounded or dead, arrive at Abur fortress - behind them come wagons full of war supplies. A messenger also arrives, bringing news from the court.
Apparently, despite initial threats, Lametanians failed to follow up on them, and the southern border is suspiciously quiet.
Also, by the Summer, a group of dwarves have arrived, inquring about the tomb and its area, as they wished to convert it into a temple of their fallen hero. The advisor and your Mother rejected the idea, but allowed the dwarves to visit the site and remove the treasures and the dead within.
By Midsummer, the court hath learned of the Siege at Abur, and therefore have sent these reinforcements to you. Unfortunately, they had to rely on mercenaries again, and because both the spirits of populace and Treasury numbers are rather low, they cannot promise that they will be able to send any more this year; your Queen Mother hopes that you can defeat the Parsians quickly.
You now have the supplies, fresh reinforcements, and the Siege of Abur has been successfully broken! The rampant (and very, very alcohol-infused) celebrations amongst your exhausted soldiers last till morning.
Few days later, your military commanders appear for an audience with you. They say that, while Abur fortress is safe, and so is the local area, eastwards, the besieged outposts - if not lost outposts - are still an issue to deal with. After lenghty debate, you decide to...
A) Leave only a small garrison at Abur, and march out with rest of Army to retake the eastern parts of Augas province in a show of Luathbas strength!
B) Keep the Abur moderately garrisoned, and send small detachments of horsemen to harass enemy singular units, forward camps and maybe even supply lines.
C) Send no one else but scouting parties to gather information for the next week or so.