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As the audience struggles to keep up with the identity of the king and who is on which side, even Shakespeare may have become confused. Montague, never a very significant character, swore his allegiance to Edward right after George left to join Warwick's forces, yet by the end of this act, Montague shows up on Henry's side. Either he changed sides along the way to little fanfare, or Shakespeare shifted Montague around without noticing it, thus, demonstrating the confusion of allegiances in this civil war.
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