Unfortunately some difficulties on subjects of mere punctilio had previously arisen. D'Estaing was a land as well as sea officer, and held the high rank of lieutenant-general in the service of France. Sullivan being only a major-general, some misunderstanding on this delicate point had been apprehended, and Washington had suggested to him the necessity of taking every precaution to avoid it. This, it was supposed, had been effected in their first conference, in which it was agreed that the Americans should land first, after which the French should land to be commanded by D'Estaing in person. The motives for this arrangement are not stated. Either his own after-reflections or the suggestions of others dissatisfied D'Estaing with it and he insisted that the descent should be made on both sides of the island precisely at the same instant, and that one wing of the American army should be attached to the French and land with them. He also declined commanding in person and wished Lafayette to take charge of the French troops as well as of the Americans attached to them.

It being feared that this alteration of the plan might endanger both its parts D'Estaing was prevailed on to reduce his demand from one wing of the American army to 1,000 militia. When afterward Sullivan crossed over into the island before the time to which he had himself postponed the descent, and without giving previous notice to the count of this movement, considerable excitement was manifested. The count refused to answer Sullivan's letter, and charged Lieutenant-Colonel Fleury, who delivered it, with being more an American than a Frenchman.

At this time a British fleet appeared which, after sailing close into the land and communicating with General Pigot, withdrew some distance and came to anchor off Point Judith, just without the narrow inlet leading into the harbor.

After it had been ascertained that the destination of the Count D'Estaing was America, he was followed by a squadron of twelve ships of the line under Admiral Byron who was designed to relieve Lord Howe, that nobleman having solicited his recall. The vessels composing this squadron meeting with weather unusually bad for the season, and being separated in different storms, arrived, after lingering through a tedious passage in various degrees of distress, on different and remote parts of the American coast. Between the departure of D'Estaing from the Hook on the 23d of July (1778) and the 30th of that month, four ships of sixty-four and fifty guns arrived at Sandy Hook.

This addition to the British fleet, though it left Lord Howe considerably inferior to the Count D'Estaing, determined him to attempt the relief of Newport. He sailed from New York on the 6th of August and on the 9th appeared in sight of the French fleet before intelligence of his departure could be received by the admiral.

At the time of his arrival the wind set directly into the harbor so that it was impossible to get out of it, but it shifted suddenly to the northeast the next morning and the count determined to stand out to sea and give battle. Previous to leaving port (August 10th) he informed General Sullivan that on his return he would land his men as that officer should advise.

Not choosing to give the advantage of the weather-gauge Lord Howe also weighed anchor and stood out to sea. He was followed by D'Estaing, and both fleets were soon out of sight.

The militia were now arrived and Sullivan's army amounted to 10,000 men. Notwithstanding some objections made by Lafayette to his commencing operations before the return of D'Estaing, Sullivan determined to commence the siege immediately. Before this determination could be executed a furious storm blew down all the tents, rendered the arms unfit for immediate use, and greatly damaged the ammunition, of which fifty rounds had just been delivered to each man. The soldiers having no shelter suffered extremely, and several perished in the storm which continued three days. On the return of fair weather the siege was commenced and continued without any material circumstance for several days.

As no intelligence had been received from the admiral the situation of the American army was becoming very critical. On the evening of the 19th their anxieties were relieved for a moment by the reappearance of the French fleet.

The two admirals, desirous the one of gaining and the other of retaining the advantage of the wind, had employed two days in maneuvering without coming to action. Toward the close of the second they were on the point of engaging when they were separated by the violent storm which had been so severely felt on shore and which dispersed both fleets. Some single vessels afterward fell in with each other, but no important capture was made, and both fleets retired in a very shattered condition, the one to the harbor of New York and the other to that of Newport.