He appeared as a witness at the Slobodan Milošević trial at the ICTY in 2003. This appearance broke his 12 years of silence; after that testimony, he gave an interview to the Zagreb-based "Globus" news magazine. In his testimony, he stated that Milošević was obviously striving to carve a Greater Serbia out of the ruins of Yugoslavia. He also revealed that both Milošević and Tuđman confirmed to him that in March 1991 in Karađorđevo they made an agreement to partition Bosnia and Herzegovina. Milošević responded by blaming Marković for the intervention of the Yugoslav Army in Slovenia. Marković denied ordering intervention in Slovenia, stating that it was outside his mandate as prime minister of Yugoslavia.