High Quality Content by WIKIPEDIA articles! The Battle of Cassinga, Cassinga Raid or Kassinga Massacre was a controversial South African airborne attack on a South West Africa People`s Organization (SWAPO) refugee camp and military base at the former town of Cassinga, Angola on 4 May 1978. Conducted as one of the three major actions of Operation Reindeer during the South African Border War, it was the South African Army’s first major air assault.