Megadeth is a pioneering American heavy metal band formed in 1983 by guitarist Dave Mustaine after his departure from Metallica. Known for their intricate guitar work and politically charged lyrics, Megadeth quickly rose to prominence in the thrash metal scene. Their album 'Rust in Peace' is often regarded as one of the greatest metal albums of all time. With hits like 'Symphony of Destruction' and 'Peace Sells,' the band has garnered a dedicated fanbase and critical acclaim. Megadeth continues to tour and release music, solidifying their legacy in the metal genre.