French participation in North America was initially maritime in nature and marked by some indecision on the part of its military leaders. In 1778, American and French planners organized an attempt to capture Newport, Rhode Island, then under British occupation. The attempt failed, in part because Admiral d'Estaing did not land French troops prior to sailing out of Narragansett Bay to meet the British fleet. He then sailed to Boston after his fleet was damaged in a storm. In 1779, d'Estaing again led his fleet to North America for joint operations, this time against British-held Savannah, Georgia. About 3,000 French joined with 2,000 Americans in the Siege of Savannah, in which a naval bombardment was unsuccessful. An attempted assault of the entrenched British position was repulsed with heavy losses.