Four soldiers found responsible for the massacre of 201 people in Dos Erres, Guatemala in 1982 have each received a sentence of 6,060 years in prison. The crime was considered one of the most hideous incidents of repression in 36 years of civil war.

Sebastian Elqueta, a Central America researcher at Amnesty International, considered the verdict a “landmark sentence” that sent a message of “justice” to thousands of human-right abuses victims during Guatemala’s civil war from 1960 to 1996.

The sentences were handed down Tuesday against Lt. Carlos Antonio Carias and special forces soldiers Manuel Pop Sun, Reyes Collin Gualip and Daniel Martinez include 30 years for each victim and another 30 years for crimes against humanity.

For three days in 1982, about 20 members of a special military unit with the Guatemalan military tortured and killed men, women and children in Dos Erres. Some were beaten with sledgehammers.