Roche remained in his roles with the regiment as they began their march to join the Southern Campaign on April 16, 1780. During the Battle of Camden on August 16, 1780, he became one of 47 prisoners of war from his regiment taken by the British forces. Several accounts reported: “In this battle the regiment of Delaware was nearly annihilated.” Roche was held until paroled at the end of the war. It was said in an obituary that his experience “was on that account, treated with so much severity as to impair his constitution for the rest of his life.”