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In page Gérard de Lally-Tollendal:

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Trophime Gerard Lally-Tollendal was born into an old aristocratic family on 5 March 1751. Although he was the legitimate son of Thomas Arthur Lally, he was kept unaware of his Irish heritage through his bringing up under the name Trophime. He learned of his ancestry the day of his own father's execution on May 9, 1766.[1] After his father's execution, Lally-Tollendal spent most of his adult life fighting to clear his father's name. During this time he attended the College of Harcourt which allowed him to gain the skills needed to not only fight against his father's verdict but participate in French government.