Dutch Republic over claims of Dutch violations of neutrality. North American operations 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. Support became more notable when, in 1780, 6,000 soldiers led by Rochambeau landed at Newport, itself abandoned in 1779 by the British, and then established a naval base there. These forces were largely inactive since the fleet was closely watched by the British fleet from its bases in New York and eastern Long Island. By early 1781, with the war dragging on, French military planners were finally convinced that more significant operations would be required in North America to bring a decisive end to the war. That year's West Indies fleet was commanded by the comte de Grasse, and specific arrangements were made to coordinate operations with him. De Grasse asked to be supplied with North American pilots and to be informed of possible operations in North America to which he might contribute. Rochambeau and Washington met in Wethersfield, Connecticut in May 1781 to discuss their options. Washington wanted to drive the British from both New York City and Virginia (the latter led first by Benedict Arnold, then by Brigadier William Phillips and eventually by Charles Cornwallis). Virginia was also seen as a potent threat that could be fought with naval assistance. These two options were dispatched to the Caribbean along with the requested pilots. Rochambeau, in a separate letter, urged de Grasse to come to the Chesapeake Bay for operations in Virginia. Following the Wethersfield conference, Rochambeau moved his army to White Plains, New York and placed his command under Washington. De Grasse received these letters in July at roughly the same time Cornwallis was preparing to occupy