Call to Arms is the sole album by American heavy metal band C4, a one-off group consisting of guitarist Michael Angelo Batio, vocalist Dan Lenegar, bassist William Kopecky and drummer John Mrozek.

The origins of C4 date back to July 2000, when guitarist Michael Angelo Batio and vocalist Dan Lenegar met and performed together for the first time at Summerfest in Milwaukee, Wisconsin.

[2] Batio subsequently invited Lenegar to perform vocals on his next solo album, which quickly evolved into a full band with the addition of bassist William Kopecky and drummer John Mrozek.

Following its initial release, Call to Arms was issued in Brazil by Rock Brigade and Laser Company Records, featuring "Voices of the Distant Past" from Batio's third solo album Tradition as a bonus track.

[9] The title track of Call to Arms was later featured on Batio's first greatest hits compilation Shred Force 1: The Essential MAB, released by Rat Pak Records in 2015.