Blue Jacket or Weyapiersenwah (circa 1743 – 1810) was a war chief of the Shawnee people, known for his militant defense of Shawnee lands in the Ohio Country. Perhaps the pre-eminent American Indian leader in the Northwest Indian War, in which a pantribal confederacy fought several battles with the nascent United States, he was an important predecessor of the famous Shawnee leader Tecumseh.