fratricide

veljensurma, veljenmurha

veljensurmaaja, veljenmurhaaja

omien joukkojen tulitus The killing of one's brother (or sister).
(quote-book)
(quote-book)|year=2014|pages=205–206|isbn=978-1-4408-0344-4|passage=Terms related to familicide include filicide (the killing of one's child or children), uxoricide (the killing of one's wife), fratricide or sororicide (the killing of one's brother or sister), avunculicide (the killing of one's uncle), and nepoticide (the killing of one's nephew).
A person who commits this crime.
1936, H. A. L. Fisher, A History of Europe, Edward Arnold Publishers, p.376,

The conversion of Russia to Christianity was effected, it would seem by a monster of cruelty and lust. That Vladimir (980–1015) was a fratricide, who maintained 3,500 concubines, has not prevented his canonization as a saint.

From January on, Third Army also spent a good deal of energy trying to solve the problem of fratricide, the killing or injuring of one's own forces by what is ironically called 'friendly fire,'...