How is Edmonds able to escape from the Confederate Army and rejoin her superiors on the Union side?

She rides off as soon as she is given her horse, crossing enemy lines into Union

territory

In the heat of battle, she manages to cross over to the Union side, where an

officer recognizes her

While Captain Logan is celebrating his recent wedding, she steals a horse and

rides off during the night

She reveals her true identity and convinces Captain Logan that she cannot in

good conscience fight as a rebel,

In the heat of battle, she manages to cross over to the Union side, where an  officer recognizes her

Explanation:

On a mission to uncover the confederate spy network in Lebanon, Kentucky, Emma Edmonds was essentially coerced into joining the Confederate force in order not to attract too much attention to herself.

As the Confederates were pulling out of the town however they met a Union force and a confrontaion ensued during which she managed to slip over to the Union side and was recognized by an officer.

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