[4] The game soon spread among Slovenian high school students, who formed their own teams in most of Slovenia's major cities, most notable being Hermes in Ljubljana and Jugoslavija in Gorizia.[4] After the end of World War I and the creation of the Kingdom of Serbs, Croats and Slovenes, later renamed to Yugoslavia, the Yugoslav Football Association was formed, which was divided in regional subassociations.During the 1945–1990 period, only a handful of Slovenian players managed to get into the Yugoslavia national team, with Branko Oblak, Srečko Katanec and Danilo Popivoda being the famous three.After Slovenia's independence in 1991, national league and cup competitions were formed on the basis of the old republic structures, with the first Slovenian PrvaLiga season therefore including 21 teams.In the same year, SR Slovenia regional selection reformed as the Slovenian national football team and played their first official match in 1992 against Estonia.