At some point they were at war with the Pralor. The two sides constructed Automated Personnel Units to help fight the war. Some time later, truce and peace was declared between the Pralor and Cravic, and the two sides agreed to dismantle the units, which were constructed only to fight this war. The Automated Personnel Units, however, could not accept this threat to their survival and turned on their builders, wiping out the entire race – the Pralor counterparts did the same.
In 2372, the crew of the USS Voyager encountered a Cravic starship manned by Cravic Automated Personnel Units. The technology of the Cravic ship was roughly equal to that of the Pralor, each with more powerful weapons, but slower engines than Voyager. (VOY: "Prototype")