. ▁Sen us ret ▁eventually ▁placed ▁his ▁py ram id ▁at ▁the ▁site ▁of ▁el - L ah un , ▁near ▁the ▁j unction ▁of ▁the ▁N ile ▁and ▁the ▁F ay u um ' s ▁major ▁ir rig ation ▁canal , ▁the ▁B ahr ▁Y us sef . ▁He ▁re igned ▁only ▁fifteen ▁years , ▁which ▁explains ▁the ▁incomplete ▁nature ▁of ▁many ▁of ▁his ▁constru ctions . ▁His ▁son ▁Sen us ret ▁III ▁succeeded ▁him . ▁ ▁Height ▁of ▁the ▁Middle ▁Kingdom ▁ ▁Sen us ret ▁III ▁was ▁a ▁war rior - king , ▁often ▁taking ▁to ▁the ▁field ▁himself . ▁In ▁his ▁sixth ▁year , ▁he ▁re - d red ged ▁an ▁Old ▁Kingdom ▁canal ▁around ▁the ▁First ▁Cat ar act ▁to ▁facil itate ▁travel ▁to ▁Upper ▁N ub ia . ▁He ▁used ▁this ▁to ▁launch ▁a ▁series ▁of ▁brut al ▁campaign s ▁in ▁N ub ia ▁in ▁his ▁sixth , ▁e ighth , ▁t enth , ▁and ▁six teenth ▁years . ▁After ▁his ▁vict ories , ▁Sen us ret ▁built ▁a ▁series ▁of ▁massive ▁for ts ▁throughout ▁the ▁country ▁to ▁establish ▁the ▁formal ▁boundary ▁between ▁Egypt ian ▁con quest s ▁and ▁un con quer ed ▁N ub ia ▁at ▁Sem na . ▁The ▁personnel ▁of ▁these ▁for ts ▁were ▁charged ▁to ▁send ▁frequent ▁reports ▁to ▁the ▁capital ▁on ▁the ▁movements ▁and ▁activities ▁of ▁the ▁local ▁Med j ay ▁n atives , ▁some ▁of ▁which ▁surv ive , ▁reve aling ▁how ▁tight ly ▁the ▁Egypt ians ▁intended ▁to ▁control ▁the ▁southern