Gov't Mule (pronounced "Government Mule") is an American Southern rock jam band, formed in 1994 as a side project of the Allman Brothers Band by guitarist Warren Haynes and bassist Allen Woody. Fans often refer to Gov't Mule simply as Mule.

The band released their debut album, Gov't Mule, in 1995, and have since released an additional nine studio albums, plus numerous EPs and live releases. Gov't Mule has become a staple act at music festivals across North America, with both its members and frequent guests from other notable bands adding various funk and blues rock elements to the band's sound.

Source: Wikipedia (https://en.wikipedia.org/wiki/Gov%27t_Mule)