The UDA/UFF were responsible for more than 400 deaths . The vast majority of its victims were Irish Catholic civilians , killed at random , in what the group called retaliation for IRA actions or attacks on Protestants . High-profile attacks carried out by the group include the Top of the Hill bar shooting , the Milltown massacre , the Sean Graham 's and James Murray 's bookmakers ' shootings , the Castlerock killings and the Greysteel massacre . Most of its attacks were in Northern Ireland , but from 1972 onward it also carried out bombings in the Republic of Ireland . The UDA/UFF declared a ceasefire in 1994 and ended its campaign in 2007 , but some of its members have continued to engage in violence . The other main Loyalist paramilitary group during the conflict was the Ulster Volunteer Force ( UVF ) . All three groups are Proscribed Organisations in the United Kingdom under the Terrorism Act 2000
Milltown massacre
Milltown Cemetery attack
Ulster Defence Association