. ▁Fr ém ont , ▁with ▁whom ▁he ▁became ▁friends . ▁ ▁On ▁January ▁ 1 3 , ▁ 1 8 4 7 , ▁And rés ▁P ico ▁approached ▁the ▁U . S . ▁commander ▁Lieutenant - Col onel ▁John ▁C . ▁Fr ém ont , ▁man ▁to ▁man ▁and ▁alone . ▁Without ▁firing ▁a ▁shot , ▁Don ▁And rés ▁and ▁Fr ém ont ▁agreed ▁to ▁the ▁terms ▁of ▁the ▁Ce ase fire ▁of ▁C ahu eng a , ▁an ▁inform al ▁agreement ▁that ▁ended ▁the ▁war ▁in ▁California , ▁in ▁exchange ▁for ▁promises ▁of ▁protection ▁of ▁California ▁from ▁ab uses ▁by ▁F rem ont ' s ▁forces ; ▁this ▁was ▁confirmed ▁by ▁the ▁Tre aty ▁of ▁San ▁Fernando , ▁formal ized ▁at ▁the ▁mission . ▁Fr ém ont ▁agreed ▁to ▁stop ▁burning ▁Californ ian ▁ran ches , ▁stop ▁ste aling ▁horses ▁and ▁cattle , ▁and ▁to ▁obey ▁the ▁positive ▁laws ▁of ▁the ▁country . ▁K ear ny , ▁the ▁command ing ▁U . S . ▁general , ▁heard ▁of ▁the ▁Tre aty , ▁he ▁gave ▁his ▁consent . ▁Peace ▁re igned . ▁ ▁Post - state hood ▁activity ▁In ▁ 1 8 5 3 , ▁Don ▁And rés ▁acquired ▁a ▁half ▁interest ▁in ▁Ran cho ▁Ex - M ission ▁San ▁Fernando ▁from ▁E ul og io ▁de ▁Cel is ; ▁it ▁was ▁split ▁along ▁present - day ▁Ros co e ▁Bou lev ard , ▁with ▁his ▁brother ▁P io ▁P ico ' s ▁land ▁being ▁the ▁southern ▁half ▁of ▁the ▁San ▁Fernando