▁U . S . ▁F 2 0 0 0 ▁National ▁Championship ▁ ▁References ▁ ▁External ▁links ▁▁▁▁ ▁Category : Ind y ▁L ights ▁seasons ▁Ind y ▁L ights <0x0A> </s> ▁Upper ▁Y af a ▁or ▁Upper ▁Y af a ' i ▁( ▁), ▁officially ▁State ▁of ▁Upper ▁Y af a ▁( ▁), ▁was ▁a ▁state ▁in ▁the ▁British ▁A den ▁Prote ctor ate ▁and ▁the ▁Prote ctor ate ▁of ▁South ▁Arab ia . ▁It ▁was ▁ruled ▁by ▁the ▁Har har ah ▁dynast y ▁and ▁its ▁capital ▁was ▁Mah j aba , ▁a ▁small ▁town ▁on ▁a ▁hill ▁located ▁by ▁road ▁ 6 2 1 , ▁about ▁ 5 0   km ▁n ortheast ▁of ▁H abil ay n . ▁ ▁History ▁The ▁Y af a ' i ▁tribe ▁has ▁tradition ally ▁inhab ited ▁the ▁mountain ous ▁hinter land ▁of ▁the ▁A den ▁area . ▁In ▁the ▁ 1 9 th ▁century ▁it ▁was ▁formed ▁by ▁two ▁s ultan ates , ▁Lower ▁and ▁Upper ▁Y af a . ▁Upper ▁Y af a ▁included ▁the ▁five ▁she ikh dom s ▁of ▁Al - Bus i , ▁Al - D h ub i , ▁Al - H ad ram i , ▁Al - M uf li hi , ▁and ▁Al - M aus ata ▁that ▁were ▁un ified ▁by ▁the ▁Har har ah ▁dynast y ▁around ▁ 1 8 0 0 . ▁A ▁treat y ▁of ▁Prote ction ▁was ▁signed ▁between ▁the ▁British ▁and ▁the ▁Sultan ▁of ▁Upper ▁Y af a ▁on ▁ 2 1 ▁October