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G-Unit is an American Hip Hop and Gangsta Rap group originating from New York City formed by 50 Cent. G-Unit emerged on the New York scene by independently releasing several mix tapes. The name of the group is short for Guerrilla Unit.

In 2003, the group's debut album, Beg for Mercy, was released. However, while the album was being recorded, Tony Yayo was sentenced to jail on charges of gun possession. Therefore, he only makes two appearances both on pre-recorded tracks. His face is seen on the brick wall of the album cover because he could not be photographed on account of his jail sentence. Beg for Mercy sold 2.3 million copies in the U.S. and 4 million copies worldwide. The only featured guests on the album were R&B singers, Joe & Butch Cassidy. Production came from Hi-Tek, Dr. Dre, Scott Storch as well as others.

Their second album, T.O.S: Terminate on Sight, was released on July 1, 2008. While the album was being recorded, internal conflicts arose betweenYoung Buck and 50 Cent, which resulted in Young Buck being kicked out of the group, but still signed to G-Unit Records.Young Buck still appeared on songs previously recorded with the group, but was credited as a featured artist. As of August 8, 2008, the album has sold 185,000 copies in the United States. Along with Young Buck, Mavado guests on the album, while production came from Swizz Beatz, Street Radio, Tha Bizness, Rick Rock, Polow da Don and others.

An upcoming third album has been confirmed by Tony Yayo in an interview about albums and beefs in August, however he said "I can't talk too much about that on camera."