The Ottoman Leutinant isn't based on a completely true story. It likely incorporates fictional characters and plotlines while using historical context as a backdrop to make the narrative more engaging.
In literature, it can be represented through vivid descriptions of the landscapes that bear the marks of both Ottoman and Greek cultures. For example, descriptions of cities with Ottoman - style mosques next to Greek Orthodox churches.
Love and relationships might also be key elements. If the lieutenant has a love interest, it can add a layer of emotion and drama to the story, while also showing how personal relationships were affected by the historical context.