With the French Mediterranean Fleet at sea , Emperor Napoleon I hoped to unite Collaboration it with the French Atlantic Fleet and together form a force powerful enough to temporarily displace Destroying the British Royal Navy Channel Fleet for long enough to allow Preventing_or_letting an invasion Military_operation force to cross Motion_directional the English Channel and land Self_motion in Britain .

James Scott , 1st Duke of Monmouth , the eldest illegitimate son of Charles II , claimed Statement to be rightful heir to the throne and attempted to displace Change James II .