who battled under commander yusuf ibn 'abd al-rahman al-fihri in a conflict ?
SELECT DISTINCT var_uri where brack_open var_x dbo_commander dbr_Yusuf_ibn_'Abd_al-Rahman_al-Fihri sep_dot var_x dbp_combatant var_uri sep_dot var_x a dbo_MilitaryConflict brack_close