▁to ▁live ▁as ▁they ▁wanted ." ▁ ▁Leg acy ▁ ▁Mu aw iy ah ▁I ' s ▁family , ▁including ▁his ▁pro gen itors , ▁Ab u ▁S uf yan ▁ibn ▁Har b ▁and ▁his ▁wife ▁H ind ▁b int ▁Ut bah , ▁were ▁originally ▁oppon ents ▁of ▁Islam ▁and ▁particularly ▁of ▁Muhammad ▁until ▁the ▁Con quest ▁of ▁Me cca , ▁but ▁they ▁converted ▁to ▁the ▁religion ▁in ▁ 6 3 0 . ▁However , ▁many ▁early ▁history ▁books , ▁e . g ., ▁The ▁Islam ic ▁Con quest ▁of ▁Sy ria ▁F atu h ush am , ▁by ▁al - Im am ▁al - W a q idi , ▁state ▁that , ▁after ▁their ▁conversion ▁to ▁Islam , ▁Muhammad ▁appointed ▁Mu aw iy ah ▁I ' s ▁father ▁Ab u ▁S uf yan ▁ibn ▁Har b ▁and ▁his ▁brother ▁Y az id ▁ibn ▁Ab i ▁S uf yan ▁as ▁army ▁command ers . ▁Mu aw iy ah ▁I , ▁Ab u ▁S uf yan ▁ibn ▁Har b , ▁Y az id ▁ibn ▁Ab i ▁S uf yan ▁and ▁H ind ▁b int ▁Ut bah ▁fought ▁in ▁the ▁Battle ▁of ▁Y arm ou k . ▁The ▁defeat ▁of ▁the ▁By z antine ▁Emperor ▁Her ac lius ▁at ▁the ▁Battle ▁of ▁Y arm ou k ▁opened ▁the ▁way ▁for ▁Muslim ▁expansion ▁into ▁Jerusalem ▁and ▁Sy ria . ▁ ▁In ▁ 6 3 9 , ▁Mu aw iy ah ▁was ▁appointed ▁as ▁the ▁governor ▁of ▁Sy ria ▁by ▁the ▁second ▁cal i ph , ▁U