musical direction, sub-genres of metal. Characterized by a rather high speed of execution and greater rigidity of the rhythm section than the classic heavy metal, combined with technically high-speed solos and bass-guitar tremolo. Homeland thrash metal is considered to be California, where in the early 80s of last century by local groups inspired by the success of NWOBHM, made in the classic heavy metal more speed, the traditional American hardcore and a bit of atmosphere punk rock. The closest related genres of early thrash metal was a speed metal, and at first did not share their critics, but later evolve into melodic speed power metal. One of the album, which ushered in a given direction, considered Kill 'Em All group Metallica, recorded in 1983. The most famous American thrash groups are Metallica, Megadeth, Slayer, Anthrax (these groups are called "big four thrash metal), Exodus, Overkill, Testament. In parallel, thrash metal was developed in Germany.
German thrash metal has a more rigid and dense sound. The most prominent representatives of this school are Destruction, Kreator, Sodom, Holy Moses, Tankard, as well as the Swiss team Coroner. The peak of popularity of thrash metal was in the mid – late 80's. Thrash-metal band Venom, Bathory and Celtic Frost in the mid-'80s albums recorded, which differed raw and dirty sound, and occult themes, and are considered the first albums in the genre of black metal.