The siege involved land forces from the United States, including the Continental Army and state militias, as well as land forces under French and British command. The British forces included a large number of troops from various German principalities of the Holy Roman Empire that were collectively known as Hessians. Since Yorktown, Virginia was specifically selected by Cornwallis for its properties as a deep-water port, both sides had naval support as well: the British forces included some Royal Navy vessels, and the Franco-American allies were supported by a large French fleet, some of whose marines were landed to assist in siege operations. German historians have noted that approximately one third of all the land forces involved were either hired or recruited from German states, or were