▁C añ ón ▁L erm anda ▁and ▁Pedro ▁Os orio ▁Gu err ero . ▁On ▁ 1 5 ▁December ▁ 1 9 7 3 , ▁gu err illas ▁shoot ▁and ▁kill ▁army ▁corpor al ▁Roberto ▁Bar ra ▁Martínez ▁in ▁the ▁sub urb ▁of ▁La ▁Re ina ▁in ▁Santiago . ▁On ▁ 2 6 ▁December ▁ 1 9 7 3 , ▁gu err illas ▁open ▁fire ▁on ▁an ▁army ▁je ep , ▁killing ▁private ▁José ▁Luis ▁Hu erta ▁A bar ca . ▁By ▁the ▁end ▁of ▁the ▁year , ▁the ▁Chile an ▁police ▁would ▁claim ▁to ▁have ▁un cover ed ▁a ▁huge ▁arms ▁cache , ▁that ▁included ▁ 5 , 0 0 0 ▁H K - 3 3 ▁sub - m ach in eg uns ▁and ▁corresponding ▁am mun ition ▁number ing ▁in ▁the ▁millions ▁and ▁large ▁quantities ▁of ▁ 2 0 - mm ▁anti - t ank ▁gun ▁shell s . ▁▁ 1 9 7 4 – 1 9 7 9 ▁On ▁February ▁ 1 9 , ▁ 1 9 7 5 , ▁four ▁captured ▁M IR ▁command ers ▁went ▁on ▁national ▁television ▁to ▁ur ge ▁their ▁gu err illas ▁to ▁lay ▁down ▁their ▁arms . ▁According ▁to ▁them , ▁the ▁M IR ▁leadership ▁was ▁in ▁ru ins : ▁of ▁the ▁ 5 2 ▁command ers ▁of ▁the ▁M IR , ▁nine ▁had ▁been ▁killed , ▁ 2 4 ▁were ▁prisoners , ▁ten ▁were ▁in ▁ex ile , ▁one ▁had ▁been ▁exp elled ▁from ▁the ▁group , ▁and ▁eight ▁were ▁still ▁at ▁large