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Pierre Soulé (August 31 1801 – March 26 1870) was a U.S. politician and diplomat from Louisiana during the mid-19th century. He is best known for his role in writing the Ostend Manifesto which was written in 1854 as part of an attempt to annex Cuba to the United States. The Manifesto was roundly denounced especially by anti-slavery elements and Soulé himself came under severe attack.Soulé was born in Castillon-en-Couserans a village in the French Pyrénées.