* involved mass arrests and detentions, forced relocations, torture, indiscriminate and mass killings
* Most mass killings occurred in the mountain villages, anyone found in the interior of the island was considered a rebel.
* Military revolt in Yeosu in 1948 against the ”murder of the people in Cheju-do” pressured the Rhee government and US military to take harsher action
* => led to Martial Law in Jeju (Nov 1948)