[Knowledge] Valencia's Ulukita Development Map

Neruda Shen, the true ruler of Mediah, was well aware of the identity of
the Letusa expedition that departed from Tarif and the Valencia forces stationed nearby.
Why did Neruda Shen leave the Shen Merchant Guild in Ulukita,
where they do not have the biggest influence?
Regarding the expedition, many say that one must consider
the nature of the Letusa expedition.
Those who are sincere to the Black Spirit do not care much about financial gain.
Moreover, the corrupted beings in the Tungrad Ruins they encountered were
known for their strong combat power in the south,
and they volunteered for that dangerous front line.
Opinions on the Valencia forces are complex...

And one conspiracy theory is that there is a secret agreement
between Neruda Shen and Prince Barhan. Could it really be true...