The siege was unsuccessful and Samuil's forces withdrew in the direction of the Croatian hinterland and Bosnia, finally tracing their way back home.After his death in 997, his son and successor Svetoslav Suronja continued the pro-Byzantine policy of his father, but his younger brothers Krešimir and Gojslav started to organize a rebellion against him, since he rejected to share power over the Kingdom.The Byzantines had conquered the north-eastern regions of the Bulgarian Empire in 971, including the capital Preslav, and in the beginning of his rule Samuil controlled only the western half of the country centred in the important province of Kutmichevitsa (approximately present-day Republic of Macedonia and southern Albania).At first he controlled only the Slavic Macedonians' lands at the southwestern part of the former large Bulgarian Empire, but later conquered a lot of Balkans.Having had no success, Samuil's army withdrew from the siege and then marched towards the Croatian hinterlands, including the territory which is now part of Bosnia and Herzegovina.