1834 Quadruple Alliance
The Quadruple Alliance, or Quadruple Entente, was a treaty signed between the United Kingdom of Great Britain and Ireland, Kingdom of France, Spain and Kingdom of Portugal on 22 April 1834, by which the four States undertook to expel from Portugal the Portuguese Infante Miguel and the Spanish Infante Carlos. With the beginning of the Carlist War, additional articles were signed in August of that year, by which the rest of the signatory parties undertook to help the legitimist government in Spain.