In whose POV (point of view) is the section from page 89-90 told?

The alchemist

This is just a helpful reminder because i haven’t read the book yet but here’s how you can tell what perspective (POV) it is:

(1st perspective uses:
We, us, our,and ourselves are all first-person pronouns. Specifically, they are plural first-person pronouns. Singular first-person pronouns include I, me, my, mine and myself.)

&

(2nd perspective uses:
you (singular and plural personal pronoun)
yours (singular and plural possessive pronoun)
yourself and yourselves (singular and plural reflexive/intensive pronouns))

&

(3rd perspective uses:
he, him, his, himself, she, her, hers, herself, it, its, itself, they, them, their, theirs, and themselves)

From mexican american war , us gained new mexico.