[kjs3]

That does sound a bit agressive. To be clear, South Korea doesn't so much 'claim the entirety of the Korean Peninsula' as much as it aims to unify the entire peninsula into a single country through peaceful means (at least, since the military government left power in the late '80s).

This article is also from 2021 and things have changed a bit in the North. North Korea changed their constitution a couple of years ago and removed any mention of unification with the South, and defined their territory as basically the existing North/South split (aka 38th parallel). South Korea has been redefined from 'partner in national unity' to 'enemy to be destroyed, by nuclear weapons if need be'.

There's a lot of pretty interesting analysis of North Korea at the 38 North blog (https://www.38north.org/), among other good sources.