page_title: Juan O'Neylle
hierarchical_section_title: Juan O'Neylle
context_page_description: Juan O'Neylle was a Spanish Field Marshal of Spanish-Irish descent. He is best known as one of the commanders during the Spanish defeat at the Battle of Tudela.
context_section_description: Juan O'Neylle (1765 – February 24, 1809) was a Spanish Field Marshal (Mariscal) of Spanish-Irish descent.  He is best known as one of the commanders during the Spanish defeat at the Battle of Tudela.
caption: The Spanish defeat at Tudela
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