In Ridley Scott's 2005 film Kingdom of Heaven, only after the bloody 3 day siege of Jerusalem ends in stalemate do Balian and Saladin agree to terms allowing the inhabitants of the city to peacefully evacuate.
Was it explained in the film why Balian didn't simply ask for terms with Saladin before the expected siege began and thus avoid pointless loss of life? If Saladin was agreeable to terms after losing thousands of men at the walls, wouldn't he have been even more favorable to allowing the defenders to leave the city without bloodshed?
Historically, Saladin did seek a peaceful turn over of Jerusalem and offered generous terms but the defenders refused. I don't recall seeing this made explicit in the film, perhaps I missed it.