Enemy of the World is the fourth studio album by American rock band Four Year Strong.

On December 18, 2009, it was announced that the band had signed to Universal Motown Records and that their next album, Enemy of the World would be released in three months' time.

[5] In January and February 2010, the band embarked on a US tour with support from the Bled, This Time Next Year, Title Fight and Strike Anywhere.

[10][11] In March and April, the band went on a US tour alongside Every Time I Die, Polar Bear Club and Trapped Under Ice.

"Bad News Bearz" and the acoustic versions of "Tonight We Feel Alive (On a Saturday)" and "Wasting Time (Eternal Summer)" were posted online ahead of the reissue.