Robert Sayer & John Bennett, A Plan of the Battle, on Bunkers Hill (1775)

London mapmakers Robert Sayer and John Bennett published this map five months after the Battle of Bunker Hill, which actually took place primarily on nearby Breed's Hill on June 17, 1775. The Battle of Bunker Hill was significant in that it showed that the colonists would not be easily defeated by the British. The British suffered over one thousand casualties and subsequently replaced General Thomas Gage with General William Howe as the British commander in Boston.  The locations of both American and British forces are labeled with yellow and red bars. The size of the bars is indicative of the number of soldiers within the troop. The map also features lines showing the routes of retreat taken by both American and British troops. The lower third of the map is an eyewitness account of the battle taken from a letter written by British General John Burgoyne to his nephew.  Modern data visualizations of the battle can be found here.