Trousers have a long history, with evidence of their use dating back to the 6th century BC. Rock carvings and artworks from Persepolis depict individuals wearing trousers, indicating their presence in ancient Persia. During this period, various Iranian peoples, including the Scythians, Sarmatians, Sogdians, and Bactrians, as well as Armenians and certain Eastern and Central Asian groups, are known to have worn trousers. These garments were practical, especially for horse-riding nomadic cultures.
EN.WIKIPEDIA.ORGThe ancient Greeks referred to the trousers worn by Eastern nations as "ἀναξυρίδες" (anaxyrides) and to the loose trousers of the Scythians as "σαράβαρα" (sarabara). Notably, the term "sarabara" is believed to have been borrowed from the Persian word "shalwār" (شلوار), indicating a linguistic connection to Persian attire.
EN.WIKIPEDIA.ORGWhile it's challenging to attribute the invention of trousers to a single culture, ancient Iranian peoples, including those from the region now known as Iran, played a significant role in their early use and development.
For a more in-depth exploration of the history of trousers, you might find this video informative: