During a business trip, Barret and Dyne were away from Corel and when they came back, the town was on fire.  When they reached the bridge to Corel, they met the people who caused the fire, Shinra.  Scarlet was in charge and ordered the troops to shoot at them.  Dyne slipped and nearly fell off a cliff, but Barret was able to grab his left hand.  The Shinra troops kept shooting and shot off Barrets right hand and Dynes left hand.  Dyne fell, but survived somehow.  Barret and Dyne both had operations that grafted gun-arms in place of their hands. 

Barret went into the burning town and found Dyne's daughter, Marlene, and took care of her from then on.  Barret left the town and became leader of Avalanche.  He led Biggs, Wedge, and Jessie.  Later on, Shinra decided to get rid of Avalanche by just destroying their headquarters, Sector 7.  Biggs, Wedge, and Jessie were killed along with all the other inhabitants of the Sector 7 slums. 

Cloud was handed leadership of Avalanche after escaping out of Midgar.  On their way of chasing Sephiroth, they happen to come by North Corel and rested at Gold Saucer.  The entire team however was captured for a crime they didn't commit and were thrown into Corel Prison.  There, the entire team finds out about Barret's past.  Barret also discovers Dyne is still alive and head of Corel Prison.  Dyne finds out that his daughter is still alive and wants to kill her to bring her to her mom.  Barret and Dyne fight and Dyne ends up losing.  He gives Barret a special memento and suicides by falling into a valley.  Barret continues with Cloud on his journey to save the planet.

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