Origin Star Trek Canon Special Note
Not everything listed in the origin is Canon. That is because only television shows and movies are considered canon. This being a comic website there are many things here that are not canon. So unless it is contradicted in film it should be listed as part of the character biography.
Kolj is unfortunate as he was blamed for incompetence and killed by his Captain for it on the Varchas
Part of the Star Trek universe Kolj was created in the Star Trek: Early Voyages Comic series.