Complex sentence: Again, Khyron nearly ruined the incident launching by an unauthorized attack on the ship that almost provoked the Micronians to fire and only when Breetai had the fighter group destroyed were they convinced that the peace offering was serious.
Split into simpler sentences: Again, Khyron nearly ruined the incident by launching an unauthorized attack on the ship that almost provoked the Micronians to fire. Only when Breetai had the fighter group destroyed were they convinced that the peace offering was serious.