During the War of 1812 (1812–1814), the British blockade of U.S. ports almost completely stifled export trade. The blockade followed a general worsening of American commerce, which had declined by almost one-fifth between 1807 and 1809.
Answer:
A vassal or liege subject is a person regarded as having a mutual obligation to a lord or monarch, in the context of the feudal system in medieval Europe. The obligations often included military support by knights in exchange for certain privileges, usually including land held as a tenant or fief.