Commemoration of the Nakba by Arab citizens of Israel who are internally displaced persons as a result of the 1948 war has been practiced for decades, but until the early 1990s was relatively weak. Initially, the memory of the catastrophe of 1948 was personal and communal in character and families or members of a given village would use the day to gather at the site of their former villages. Small scale commemorations of the tenth anniversary in the form of silent vigils were held by Arab students at a few schools in Israel in 1958, despite attempts by the Israeli authorities to thwart them. Visits to the sites of former villages became increasingly visible after the events of Land Day in 1976. In the wake up of the failure of the 1991 Madrid Conference to broach the subject of refugees, the Association for the Defense of the Rights of the Internally Displaced in Israel was founded to organize a March of Return to the site of a different village every year on 15 May so as to place the issue on the Israeli public agenda.