National officials were not invited again to the annual commemoration for nearly 20 years.
He decided that an annual commemoration would be held on 1 June.
An annual commemoration is held there on his birthday.
Vulović attended annual commemorations at the crash site, until they were stopped in 2002.
An annual commemoration is planned each year; in 2008 the event took place on Sunday September 21.
There is an annual commemoration of his death at the site of the ambush.
Today, the square is the center of an annual commemoration by atheists and freethinkers.
Participants said they hoped that it would lead to an annual commemoration.
The annual commemoration of the battle is important for many nationalist Frisians.
It is the site of annual commemorations on December 6.