▁region . ▁Um ay r ▁served ▁in ▁the ▁army ▁of ▁Um ay y ad ▁cal i ph ▁Mu ' aw iy ah ▁I ▁( r . ▁ 6 6 1 – 6 8 0 ). ▁Fight ing ▁under ▁the ▁command ▁of ▁his ▁fellow ▁Sul ay mi ▁tribes man , ▁Saf wan ▁ibn ▁Mu ' att al , ▁Um ay r ▁played ▁an ▁instrument al ▁role ▁in ▁the ▁Um ay y ads ' ▁capture ▁of ▁an ▁Armen ian ▁for tr ess ▁known ▁as ▁" Ḥ i ṣ n ▁Kam kh " ▁( K am ach a ) ▁in ▁ 6 7 8 . ▁He ▁acquired ▁fame ▁during ▁this ▁operation , ▁with ▁ 9 th - century ▁historian ▁al - Bal ad h uri ▁writing : ▁ ▁... ▁U ma ir ▁ibn ▁al - Hub ab ▁as - S ul ami , ▁who ▁clim bed ▁the ▁wall ▁[ of ▁the ▁for tr ess ] ▁and ▁kept ▁struggling ▁single - hand ed ▁until ▁the ▁Gree ks ▁[ By z ant ines ] ▁gave ▁way ▁and ▁the ▁Mos le ms ▁clim bed ▁up . ▁Thus ▁the ▁reduction ▁of ▁Kam kh ▁was ▁due ▁to ▁U ma ir ▁ibn ▁al - Hub ab ▁and ▁was ▁the ▁thing ▁in ▁which ▁he ▁bo asted ▁and ▁others ▁bo asted ▁for ▁him . ▁— ▁Al - Bal ad h uri ▁ ▁According ▁to ▁historian ▁Pat ric ia ▁Cr one , ▁Um ay r ▁is ▁better ▁known ▁for ▁his ▁role ▁in ▁the ▁Second ▁Muslim ▁Civil ▁War . ▁Despite ▁being ▁a ▁member ▁of ▁the ▁Q