During the First Cylon War there where times when the Colonial Fleet Command thought that these Cylon monsters they had created would fight until the end and try to destroy humanity in its entirety. Then all of a sudden the Cylons sued for peace, the most unexpected move of the whole war. So after the peace talks, the construction of the Armistice Station and the disappearance of the Cylons behind the Armistice Line in search of a new homeworld, Colonial Fleet Command decided that something needed to be done against the threat of another Cylon attack in the future.