''Join the Army'' is the second album by Suicidal Tendencies and also their first album since the self-titled debut in 4 years. This album was released in 1987. One of the well known albums that had the crossover genre of punk and metal known as thrash. Mike Muir used different vocal ranges compared to the self-titled album (sometimes sounding similar to Lemmy from Motörhead). Grant Estes was replaced by Jon Nelson who was then replaced by Rocky George in 1984 after, and influenced the change of the bands sound into a more of thrash direction. Amery Smith was replaced by R.J. Herrera, who used the particularly metal drum feature of double bass. It was produced by Lester Claypool (not to be confused with Les Claypool of the band Primus).

"War Inside My Head" is featured in the game Guitar Hero: Metallica. "Possessed to Skate" is featured in the game Skate 2.

"Suicidal Maniac" was covered by Hatebreed on their 2009 release For The Lions. - Wikipedia