You declare that peasants are to be drafted into the new corps and you will personally lead that to Augas province.
Congratulations! Houlandin II is now on a military campaign! During the campaign, the range of events will be very limited (in this case, related to Parsia and/or war with it), you won't be making choices about the Kingdom and the End of the Year reports (and possible choices) won't be available to you.
The advisor and Queen Mother Ciri shall deal (for better or worse) with any potential events that might happen during your stay in Augas province.
Onwards!
817 AD, Mid-Spring
You arrive at the Fortress of Abur, located just north of the largest city of Augas Province.
The forested lands and grassy meadows of your homeland are gone; replaced with more rugged, rocky shrublands of West Parsia.
The Luathbas soldiers stationed in the garrison cheer, seeing their young King arrive!
817 AD, Late Spring
Less than a month later a messenger arrives from the easternmost keeps; the Parsians are on the move, and their smaller forces are besieging few smaller outposts. The main body of their army is marching westwards toward Abur.
The scouts report that most of it is spearmen and short bowmen, with a strong core of the fearsome Parsian Cataphracts, used as shock cavalry to devastating effect.
Spies have found out that the Parsians also are bringing lots of supplies and ample amount of timber from their northern forest, definitely to construct lots of siege equipment (as most of Parsian locales are low on forested areas).
The Marshal and commanders convene with you, and you decide to...
A) Prepare Abur for a lengthy siege; after all, we didn't let that old engineer to improve the fortifications for them to not be used nowadays!
B) We shall march out with most of our glorious, numerous Army and meet the Parsians head-on.
C) Leave half the forces at Abur; the rest will be sent eastwards and tasked with harassing the Parsian horde and/or trying to break the sieges on the less important outposts.