Complex sentence: However, following their emphatic defeat at the Battle of Towton she sided closely with the House of York; three years after the battle and the accession of Edward IV of England, her eldest daughter Elizabeth Woodville married the new King to become his Queen Consort.
Split into simpler sentences: However, following the emphatic Lancastrian defeat at the Battle of Towton she sided closely with the House of York. Three years after the battle and the accession of Edward IV of England, her eldest daughter Elizabeth Woodville married the new King to become his Queen Consort.