established among the various series in the Macross franchise. U.N. Spacy The is a fictional space military arm of the . It was established by the successor to the modern United Nations in order to defend Earth from a possible attack by hostile aliens, and was involved in Space War I against an extraterrestrial race called the Zentradi. Later operations of the U.N. Spacy expanded into interstellar colonization and general peacekeeping of off-world Earth settlements. The term "Spacy" is a portmanteau of the terms Space and Army or Navy. Some Japanese sources also use the term Space Army and some English-language sources use the term Space Navy, suggesting that the term is a contraction. Variable fighters A variable fighter (also known as a "veritech" fighter in the Robotech adaptation of the series), is one of a series of transformable aerospace fighters, primarily designed by franchise creator Shōji Kawamori and Kazutaka Miyatake. They are generally able to transform into jet/space fighters, a humanoid robot and a hybrid of the two modes, better known as Gerwalk (Guardian). The original VF-1 Valkyrie was actually named "Valkyrie", but the craft have generically been referred to as such in the series since then. Music Music is integral part to almost every Macross title by having significances in a series' antagonists behavior towards it. Music idols also play a central role to various Macross stories. Often, the protagonist will be involved in a love triangle with a series' music idol; most notably, Lynn Minmay. Space fold Space folding permits nearly-instantaneous ultra-long distance travel: a space-fold transports a spacecraft in a very short amount of time by first swapping the location of the spacecraft with super dimension space or subspace, and then swapping the Super Dimension space with the space at the destination. According to U.N. Spacy First Lieutenant Hayase Misa during Space War I (2009–2012) an hour passes in super dimension space as approximately ten days passes in normal space. One of the latest Macross TV series, Macross Frontier, further expands on that concept by introducing fold faults or dislocations, which further retard fold travel and interfere with fold communications. Also explained in Macross Frontier are the limitations of space folding, such as the geometric increase in energy requirement with the mass of the object to be folded, which prevents very large objects from being folded with ease across vast distances. The act of entering Super