As for why the Loran Expeditionary Force didn't seek supplies from the Holland Kingdom, several factors were involved.
Loran City-State had supported the Holland Kingdom against the Lizardman Kingdom in exchange for a division of territory. The Holland Kingdom had granted the noble families of Loran City-State territories in the plane, and had no obligation to supply the Loran Expeditionary Force.
If the Loran Expeditionary Force wanted supplies, it had to buy them from the Holland Kingdom at high prices.
The Holland Kingdom had been fighting the Lizardman Kingdom for years. It didn't have enough war supplies of its own, such as weapons, armor, and arrows. How could it possibly sell them to the Loran Expeditionary Force?
As for food, the Holland Kingdom didn't have a tropical monsoon climate like Odyssey. Its winters were cold, and even in the most favorable regions, crops could only be harvested twice a year. In many areas, the harvest came three times every two years, or even just once a year.
The Holland Kingdom's grain output wasn't high. On top of that, political factors meant the Loran Expeditionary Force would have to pay exorbitant prices for small quantities of grain, which wouldn't solve its supply problems.
Loran City-State, for its part, didn't want to depend on the Holland Kingdom for supplies, as that would put it at a disadvantage in negotiations.
For reasons of both self-interest and circumstance, the Loran Expeditionary Force couldn't buy basic war supplies from the Holland Kingdom.
The Wrynn Family were nobles of Loran City-State. If Medivh could solve their supply problems in this plane, the Noble Council of Loran City-State wouldn't object.
The interests of the Wrynn Family aligned with those of the Noble Council of Loran City-State.
Thanks to the environmental transformation around Wrynn Dark Tower, Ulan City's