Complex sentence: In order to end the war, Athrun and Cagalli go into Jachin Due and find Patrick shot by a ZAFT commander before he could fire the superweapon GENESIS.
Split into simpler sentences: In order to end the war, Athrun and Cagalli go into Jachin Due. There they find Patrick had shot by a ZAFT commander before he could fire the superweapon GENESIS.