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Movies like Sharpe's Siege (1996)

Winter, 1813. Sharpe marries his sweetheart, Jane Gibbons, but has to leave her immediately to go on a dangerous mission in the Pyrenees, to capture a French fort. While Sharpe is battling with the French, his wife contracts a deadly fever which has swept through the British camp and endangers her life. Sharpe encounters his old enemy, Ducos and is compelled to stay at the fort and fight for his country, knowing that even if he survives he may never see his beloved bride again.