They drew up a four phase programme to co-opt the Tamil-speaking Muslims of the eastern province into the Eelam struggle, by working closely with them, and understanding and espousing their grievances.
In 1976, the EROS established links with the Abu Jihad of the Palestine Liberation Organization (PLO) and began planning the setting up of camps to train Sri Lankan Tamils in military and guerrilla warfare.
Their most notable military actions was the bombings in Sri Lanka in 1984 and 1985, and the kidnapping of British journalist Penelope Willis.
EROS contested the 1989 parliamentary election as an independent group in four electoral districts in the north-east of Sri Lanka.
One of its two top leaders, V. Balakumaran, together with a large portion of its members, left EROS to join the LTTE, saying it was a betrayal of the Tamil cause not to take up arms.
makes frequent references to the Sri Lankan Civil War and her father's participation in EROS.