Sparta has cancelled all the remaining dates on their North American tour. The band posted this on their website:

Sparta has regretfully announced the cancellation of the remaining dates on this current tour. Guitarist Paul Hinojos suffered a ruptured disk in his back and has been forced to return to Los Angeles for treatment. Though the dates will not be rescheduled in the immediate future, the band will do all it can to make them up on their next tour. Meanwhile, the band plans to continue working on songs for a new album.

The band had about two weeks of dates left in their tour supporting Porcelain.