On 17 October 1990 Croatia hosted the United States in an unofficial international friendly in Zagreb's Maksimir stadium.
[2] With the abolishing of the one-party political system in SFR Yugoslavia in 1990, SR Croatia's (constituent republic within the Yugoslav federation) first parliamentary elections were held over two rounds of voting on 22 April and 7 May 1990 resulting in an overwhelming victory for the nationalist Croatian Democratic Union (HDZ) led by Franjo Tuđman.
With the rising nationalism and ethnic tensions, several incidents took place at football matches in SR Croatia over the coming months.
Dinamo midfielder 21-year-old Zvonimir Boban attacked a policeman and got a 6-month suspension by the Yugoslav FA (FSJ), causing him to miss the 1990 FIFA World Cup as well as the pre-tournament friendlies.
[3] At one of those friendlies on 3 June 1990 versus the Netherlands at Maksimir Stadium in Zagreb (Yugoslavia's last preparation match before the World Cup) local Croatian fans booed the Yugoslav anthem and players, while cheering for the opposing Netherlands side which won the match 0-2.