He was killed in an attack by the Yugoslav People's Army (JNA) in the town of Borovo Naselje during the Battle of Vukovar.

Blago Zadro was born in the small village of Donji Mamići near Grude in western Herzegovina.

Zadro was interested in Croatian history, particularly the Bleiburg death marches, and was not a supporter of the Communist authorities.

[3] In early 1990, due to mismanagement of the Borovo conglomerate, Zadro organized strikes and asked for the dismissal of the director.

Speaker of the Croatian Parliament Vladimir Šeks stated "without heroes like Blago Zadro, there would be no free Croatia".