 After fallout from the unsuccessful <unk> campaign of the late 1970s , the Barre administration began arresting government and military officials under suspicion of participation in the abortive 1978 coup d 'état . Most of the people who had allegedly helped plot the putsch were summarily executed . However , several officials managed to escape abroad and started to form the first of various <unk> groups dedicated to ousting Barre 's regime by force . 
