Fratricide is when you kill your own brother.
Fratricide is when you kill a brother in arms (soldier or political/religous brother) who you are fighting with either on purpose or by accident.
1: a person who murders their brother or sister
2: the act of murdering your own brother or sister
3: fire that injures or kills an ally, or fellow countryman, commonly referred to as friendly fire
Today's death toll si 2,100. Sadly 600 of these were from incidents of fratricide.
Many of our brothers in arms have been killed by fratricide, don't let you, or your battle buddy
be the next one to be shot up by a jack leg
or a blue falcon