Impressment, colloquially "the press" or the "press gang", is a type of conscription of people into a military force, especially a naval force, via intimidation and physical coercion, conducted by an organized group (hence "gang"). The navies of several European nations used various means of impressment starting in the late 16th century and continuing into the 19th century. The large size of the British Royal Navy in the Age of Sail meant that impressment was most commonly associated with Great Britain and Ireland. It was used by the Royal Navy in wartime, beginning in 1664 and during the 18th and early 19th centuries, as a means of crewing warships, although legal sanction for the practice can be traced back to the time of Edward I of England.
The Royal Navy impressed many merchant sailors, as well as some sailors from other, mostly European, nations. People liable to impressment were "eligible men of seafaring habits between the ages of 18 and 55 years". Non-seamen were sometimes impressed as well, though rarely. In addition to the Royal Navy's use of impressment, the British Army also experimented with impressment from 1778 to 1780.