The Siege of Melilla was an attempt by the British-backed[2] Sultanate of Morocco to capture the Spanish fortress of Melilla on the Moroccan Mediterranean coast. Mohammed ben Abdallah, then Sultan of Morocco, invested Melilla in December 1774 with a large army of Royal Moroccan soldiers and Algerian mercenaries. The city was defended by a small garrison under Irish-born Governor Don Juan Sherlocke until the siege was lifted by a relief fleet in March 1775.