John O'Sullivan (soldier)

Sir John William O'Sullivan
Sir John O'Sullivan, from a portrait miniature
Born	c. 1700 County Kerry, Ireland
Died	c. 1760 (aged 59–60)
Buried	Annezin-les-Béthune
Allegiance	France Jacobites
Rank	Colonel
Battles / wars	Jacobite rising of 1745 Battle of Prestonpans Battle of Falkirk Battle of Culloden War of the Austrian Succession: Battle of Lauffeld
Relations	John L. O'Sullivan (great-grandson)

Sir John William O'Sullivan (c. 1700 – c. 1760) was an Irish professional soldier, who spent most of his career in the service of France, but is best known for his involvement in the Jacobite rising of 1745, an attempt to regain the British throne for the exiled House of Stuart. During the Rising, he acted as adjutant general and quartermaster general of the Jacobite army and had a major influence on the campaign.

Although many secondary works give his surname as "O'Sullivan", he used the form "Sullivan" in his own correspondence.^[1]