The 50th, or Shirley's Regiment of Foot was a British Army regiment first raised in 1745.
History
The regiment was first raised by William Shirley in New England as William Shirley's Regiment of Foot and ranked as the 65th Regiment of Foot in September 1745. It was disbanded in May 1749.
The regiment was re-raised in New England as the 50th Regiment of Foot (American Provincials) in December 1754 for service in the French and Indian War but, following the disastrous loss of Oswego, it was disbanded in December 1756.
References
Shirley's Regiment Wikipedia(Text) CC BY-SA