The BETA are an extraterrestrial species that made contact with the American Viking 1 in 1958. They were not found to be hostile until the 1967 Sacrobosco Incident when they invaded Earth’s Lunar Base before invading Earth. The BETA vary greatly in size, with the smallest identified strain (Soldier-class) being around 3 meters tall, and the largest identified strains (Fortresss-class) at over 60 meters tall. Some species are able to take flight, and many have Laser capabilities rendering most aerial military operations useless. Biological information regarding the BETA is either nonexistent or top secret.