sentences:  His army resisted repelling Hungarian assaults, and restored Croatian rule up to the river Sava.He reassembled his forces in Croatia and advanced on Gvozd Mountain, where he met the main Hungarian army led by King Coloman I of Hungary.In 1097, in the Battle of Gvozd Mountain, the last native king Peter was killed and the Croats were decisively defeated (because of this, the mountain was this time renamed to Petrova Gora, "Peter's Mountain").