What was Troy called in Hittite texts?

Research concerning the relationship between Troy and the Hittites and the name of Troy in Hittite texts goes as far back as to the first quarter of the twentieth century. Especially while the map of Hittite culture was being drawn, in terms of problems of localization (where each settlement is), the name Wilusa became prominent. The name Wilusa was first cited in Hittite texts in conjunction with the Big King Tudhalja I (1420-1400 B. C. E.). In this text, Wilusa is mentioned by name in a detailed account of Tudhalja I's "military expedition against Arzawa countries." Wilusa must have been located in relation to the "Arzawa countries," which fought against the Hittites during the reign of Hattusili I (1565-1540 B. C. E.), who lived approximately a hundred years prior to Tudhalja I. After reading these texts, researchers attempted to figure out where "Arzawa countries" would be. These aforementioned "Arzawa countries," having first been important in the 1950s, was located in West Anatolia, and after a short while more certainly put in the capital of the area, Apasas (it is now accepted that this name is the same as the late Ephesus in Greek), between the Meander Valley in the south and Hermos Valley on the north by J. Garstang and O. R. Gruney. This localization has been certified in 1997 by Frank Starke (Tübingen - Germany) and David Hawkins (London - England) independently of each other. Therefore, the long standing question of where Wilusa is has been answered without doubt. There are approximately twenty names among the "countries" that declared war against the Tudhalja I mentioned in the texts, where Tudhalja I recounts his military expeditions. It has been accepted that these names belong to the small and large government centers in the Assuwa area. Among these names, the last two are "the country of Wilusija" (a version of Wilusa) and "the country of Taruisa." Philologists Emil Forrrer and Paul Kretschmer had proposed in 1924 that Wilusija/Wilusa, the place 700 years after the Tudhalja's expedition, is the same place as Ilios in the Illiad penned by Homer in 730 B. C. E., and as the pre-Homeric Wilios; they also theorized about Taruisa (it should be read as Truwisa according to Hittite linguistic rules) that Troy in Homer's epic (in Ionian dialects it is spelled Troië) is derived from the Hittite Trowija or Trowisa, and that they talk about the same place. Research in recent years confirmed this fact.