The Near-Apocalypse of '09 was a dramatic event in which Batman played a pivotal role.
The known participants in the conflict were Batman, Ra's al Ghul and Talia. According to stories told to Terry McGinnis, Talia turned on her father and aided Batman in putting an end to Ra's machination. Ra's apparently perished in the battle's climax, but merely laid low until the right moment to strike again.
However, Ra's was severely injured during the incident beyond what the Lazarus Pit could restore. In order to save him, Talia sacrificed her life as Ra's' neural patterns were transferred into her and thus Ra's was reborn in his own daughter's body.