Final answer:
The provided references do not contain information about Edward leaving Dauntless. This event is likely from a work of fiction, such as Veronica Roth's 'Divergent' series, which is not represented in the provided text excerpts.
Step-by-step explanation:
Edward's departure from Dauntless occurs in a passage that is rich in narrative detail and thematic development.
However, using the provided references, there seems to be no clear event or context that specifically refers to 'Edward' leaving 'Dauntless', which appears to refer to a plot point in a fictional story, possibly Veronica Roth's 'Divergent' series.
The snippets provided, although they contain a variety of character-driven and action-heavy scenes, do not directly address the question posed.
The references provided range from the valorous undertakings of a champion dealing with a dragon, to tense social interactions following a tragic wartime loss, and even include elements of historical valor and fantasy adventure.
To answer the student's original question, one would need a direct reference from the correct source material detailing the events leading up to and including Edward's departure from Dauntless.