 Such Cycles cover the defining events of each period, such as the Pax Mæsra (the period of the Mæsron Alliance's furthest extent in power and influence) and the Invasions (when the Andromedans and Souldra sought to conquer the Omega races).The first, earliest products published in the Star Fleet Universe presented material pertaining to the races and empires of the Alpha Octant during the period of the Middle years (approximately the era in which the original USS "Enterprise" of the United Federation of Planets undertook its first five-year mission).The first product, "the Pocket Edition", presented the Federation, the Klingon Empire, the Romulan Empire, the Kzinti Hegemony, the Gorn Confederation, the Orion Pirates, and the Tholian Holdfast.