He gets sent off to another war. This one is a neighboring country getting invaded by that empire that summoned him.
He basically cripples the empires army by completely owning the entire logistics of said army effectively grabbing them by the balls literally without supplies.
The neighboring country king tho is also an idiot and decides to broker a peace instead of slaughtering the crippled army.
In short he has only DELAY'd another possible assault by a couple of months, instead of years if he had captured the princess general as a hostage at the very least + slaughtered the Army.
Ryoma then goes back to his country.
He has a fallout with a Earl.
Country thought the Earl would slaughter Ryoma, but it's the other way around.
He slaughters the Earl and takes his land effectively making 1/3rd of the country his.
Ryoma makes deals with an Exiled merchant from the Earl's territory to effectively make Wortenia a Nexus of Trade and Transport.
This would effectively make it a major trade hub and boost profit on a epic sale.
He restores order in the territory, slaughters all the pirates, and even gets the elves to owe him one.
Yes there are Elves.
While his country is developing, he has a shinobi army keeping all info on lockdown.
The Country and Earl tried to send spies to check out land, but they all died before they even knew what was happening.
The country is also going though riots and revolutions.
The Queen is an IDIOT.
You have no clue how stupid she and her cabinet is.
She has no idea how to rule a country, and Gerhaldht isn't making things easy for her.
She also basically chases out Elena as well and guess who takes commander in place of her again?
If you guessed the idiot Mikal, yes the idiot that got himself captured and was traded for Gerhaldht's life, you guessed right.
Elena gets pushed to the boarder, and is now conflicted because all the predictions Ryoma gave her in regards to the country falling.
Yes Ryoma predicted everything the stupid Queen would do, and it terrifies Elena in how fast its happening and how accurate it is.
She makes up her mind if Ryoma revolts, she will side with him because he now represents the Country, and Elena was loyal to the Country, not the Bloodline.
Ryoma then gathers support from other Earls, basically usurping more control then the Queen.
The country is eminent to fall in fire.
Ryoma is then summoned to Court to be judged, because the country is scared of how powerful he has become.
He has too much territory and an Army which can defeat a major player like the Earl.
Idiot Country thinks they can disavow him and steal his lands.
This is as far as translations goes.
I think the ending of that vol will also be where he declares independence, and also War.
BTW Wortenia is now too powerful because it has the backing of another large country almost on the same scale as the empire because they too also want to use it as a trade Nexus, which Ryoma has been nicely developing.