lied ▁with ▁were ▁enemies ▁of ▁O da ▁Nob un aga . ▁Begin ning ▁on ▁September ▁ 2 9 , ▁ 1 5 7 1 , ▁Nob un aga ' s ▁army ▁of ▁ 3 0 , 0 0 0 ▁led ▁the ▁Sie ge ▁of ▁Mount ▁H iei , ▁destroy ing ▁En ry aku - ji ▁and ▁mass ac ring ▁thousands . ▁Though ▁it ▁was ▁re built , ▁the ▁standing ▁army ▁of ▁war rior ▁mon ks ▁would ▁never ▁be ▁reconst it uted ▁after ▁this ▁dev ast ation . ▁ ▁Nob un aga ▁then ▁moved ▁on ▁to ▁fighting ▁the ▁I kk ō - ik ki ▁in ▁their ▁for tr esses ▁of ▁Nag ash ima ▁and ▁I sh iy ama ▁Hong an - ji ▁( see ▁Sie ges ▁of ▁Nag ash ima , ▁I sh iy ama ▁Hong an - ji ▁War ). ▁In ▁the ▁summer ▁of ▁ 1 5 7 4 , ▁with ▁the ▁help ▁of ▁former ▁pir ate ▁Ku ki ▁Y osh it aka , ▁Nob un aga ▁essentially ▁block aded ▁the ▁I kk ō ▁for tr esses ▁and ▁star ved ▁them ▁into ▁submission . ▁The ▁ 2 0 , 0 0 0 ▁inhabitants ▁of ▁the ▁for tr ess ▁went ▁up ▁in ▁fl ames ▁along ▁with ▁their ▁home . ▁Two ▁years ▁later , ▁Nob un aga ▁returned ▁to ▁the ▁I sh iy ama ▁Hong an - ji , ▁which ▁he ▁had ▁failed ▁to ▁take ▁earlier . ▁At ▁the ▁two ▁Batt les ▁of ▁K iz ug aw ag uch i , ▁Nob un aga ▁defeated