Well, you know at least one of these countries well.

In this corner is Venezuela! Socialist, a lot of corruption, Chavista, speaks Spanish, allied with Russia, Argentina, Nicaragua, and all those nations, and wants Esequibo back!

And in this corner is its small neighbor, Guyana! Speaks english, was a british colony, and almost 3/4 of its land is the Esequibo!(I don't know much about this country).

So, what are they fighting for?

The Esequibo!

Here for more info: https://en.m.wikipedia.org/wiki/Guayana_Esequiba

What is my opinion?

Esequibo is... I don't really know. Let a referendum decide.