Jonathan Plowman Jr. (1717–1795) was a spy and a privateer during the American Revolutionary War. His spying activities were as part of a group of Revolutionaries who reported on British troop movements. After the war broke out and trade with Britain was halted, Plowman and other merchants of Baltimore became privateers. They took their merchant ships and sent them out to raid and plunder British commerce enriching themselves and Baltimore. His resistance to British rule began earlier than that when, as a prominent merchant in Baltimore, Jonathan Plowman Jr. signed the non-importation agreement along with other merchants throughout the 13 colonies in a united effort to resisted British taxation and abuses. His sons fought the British redcoats on the battlefield as members of both the regul