There are 2 bands with the name Defiance: (1) Defiance is a thrash metal band from Oakland, California. While virtually unknown to mainstream metal and rock circles, Defiance is known as one of the classic second-tier thrash bands to come from the Bay Area thrash metal scene. They played a decidedly technical style of thrash originally evoking bands like Testament, though they would later move on to playing in their own unique, more progressive thrash style. They reformed in 2005 and have since release an album entitled The Prophecy in late 2009.
Hirax is an American thrash metal band from Buena Park, California. Starting in 1984 under the leadership of vocalist Katon W. De Pena, the band played in Los Angeles and San Francisco with the other new thrash metal bands of the area such as Metallica, Exodus and Slayer. The band was a clear example of the thrash/speed metal/crossover genre. After releasing some demos, Hirax signed with Metal Blade and debuted with their first full-length, "Raging Violence" in 1985. The band was composed of Katon W. De Pena (vocals), Scott Owen (guitar), Gary Monardo (bass) and John Tabares (drums).
There are several bands/artists known as Demolition. (1) A Canadian hardcore punk band (2) A UK punk, (3) a Japanese Thrash Metal band and (4) an Irish American Hip-Hop duo made up of the MC Euyo & the DJ Drama. (1) Demolition are a Canadian band from Barrie, ON that play hardcore punk in the style of Altercation, Agnostic Front, and early Madball. They have released one demo and have members from the now broken up band, Planet Danger.
(2) UK Punk:
This is the band Paul Baloff was in (in 1988)after his Exodus days (and before joining Exodus again some 8 years later). Not much info can be found about this band. Baloff left the band soon after their 2 song demo (and only release - rumoured to be produced by Metallica frontman James Hetfield) to try his luck with Bay area gods Heathen (he only stayed for a 2 song demo here awell).
He then founded a new Piranha with a complete different lineup but they disbanded soon after.