In what year was the album “Union Black” released by Skindred?

In what year was the album “Union Black” released by Skindred?: The album “Union Black” was released in 2011 by Skindred, featuring 13 tracks.
What is the most successful song from the album “Union Black” by Skindred?: “Warning” is the biggest hit from the album “Union Black” by Skindred.

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