▁dep ot ▁and ▁to ▁house ▁the ▁g arrison . ▁ ▁On ▁August ▁ 1 0 , ▁ 1 8 1 6 , ▁President ▁Marc ó ▁del ▁Pont ▁commission ed ▁him ▁to ▁find ▁and ▁organ ize ▁a ▁place ▁to ▁Camp us ▁Mart ius , ▁to ▁instruct ▁the ▁troops . ▁He ▁is ▁considered ▁one ▁of ▁the ▁most ▁distinguished ▁military ▁engine ers ▁in ▁the ▁history ▁of ▁Chile . ▁ ▁After ▁the ▁defeat ▁of ▁the ▁royal ist ▁army ▁in ▁the ▁battle ▁of ▁Ch ac ab u co ▁by ▁the ▁Army ▁of ▁the ▁And es ▁under ▁General ▁José ▁de ▁San ▁Martín , ▁then ▁returned ▁to ▁Peru , ▁being ▁one ▁of ▁the ▁command ers ▁in ▁chief ▁of ▁the ▁fleet ▁of ▁ 1 1 ▁ships ▁that ▁brought ▁back ▁the ▁remains ▁of ▁the ▁Spanish ▁army ▁at ▁El ▁Cal la o . ▁ ▁Between ▁ 1 8 1 8 ▁and ▁ 1 8 2 2 , ▁Field ▁Marsh al ▁Manuel ▁O lag uer ▁F eli u , ▁as ▁Director ▁of ▁the ▁Royal ▁Engine ers ▁and ▁Deput y ▁Ins pect or ▁of ▁the ▁Vic ero yal ty ▁of ▁Peru , ▁joined ▁the ▁War ▁Council ▁( J unta ▁de ▁Guerra ▁in ▁Spanish ) ▁cha ired ▁by ▁the ▁Vic ero y ▁Pe z uela . ▁Later , ▁he ▁was ▁appointed ▁by ▁the ▁Vic ero y ▁of ▁La ▁S erna ▁as ▁Deput y ▁of ▁the ▁council ▁of ▁Pac ification ▁of ▁the ▁Peru , ▁where ▁they ▁tried ▁with ▁General ▁José ▁de ▁San ▁Martín ▁the ▁conditions ▁of ▁surrender ▁of ▁El ▁Cal la o . ▁ ▁In ▁ 1