Daubón offered his services and the use of his vessel and men to the Spanish Colonial Governor of Puerto Rico and together with the French Consul on the island, M. Paris, gathered a group of French immigrants in Puerto Rico and sent these troops to successfully protect the entrance of San Juan at Fort San Gerónimo. Among the French surnames of those who fought on the Island were: Bernard, Hirigoyan, Chateau, Roussell, Larrac and Mallet. It is also worthy of note to mention that the British attempted to land in San Juan harbor with a force of 400 French prisoners, who were forced to fight against their will the other French troops defending Puerto Rico.