Complex sentence: This fight determined the withdrawal of the Muslim army which tried to assist the city of Huesca, guaranteeing the continuity of the Aragonese siege against the square, and it led irremissibly to the reconquest of this valuable city for the kingdom.
Split into simpler sentences: This fight determined the withdrawal of the Muslim army which tried to assist the city of Huesca, guaranteeing the continuity of the Aragonese siege against the square. Moreover, it led irremissibly to the reconquest of this valuable city for the kingdom.