Lazarus A.D. is a thrash metal band from Kenosha, Wisconsin, originally formed as "Lazarus" in 2005. The "A.D." was added to avoid potential legal issues.

In 2006, Lazarus A.D. was selected as an opening act for Anthrax. In 2007, they released their debut album, The Onslaught. The band sent the self released album out to many known metal record labels. The labels turned the band down for a record deal. Later one of the songs off The Onslaught was added to a compilation album by Earache Records. Not long after, the album received rave reviews in metal underground and drew the attention of Metal Blade Records. The band landed a contract with Metal Blade and The Onslaught was re-released in 2009. Lazarus A.D. toured with Amon Amarth and Goatwhore in April 2009, and toured with Testament and Unearth during May and June 2009. Then quickly after, the band toured with Bison B.C. on the Baptized in Beer 2009 tour from July to August of that year then in the inter toured with Ensiferum on the Tour From Afar.