The US defined combatant in their latest wars as any male killed over the age of 14, so the ratio is a bit up to how people choose to define combatant vs civili

The US defined combatant in their latest wars as any male killed over the age of 14, so the ratio is a bit up to how people choose to define combatant vs civilian. The wikipedia article should be read as a starting point in understanding how extremely unreliable those numbers are, and how much it depend on how people define combatant and civilian.