Complex sentence: Other tasks included helping the Royal Engineers clear the Livno minefield, one of the biggest ever laid in the former Yugoslavia and the deployment of covert OPs as part of Op COMET and Op METEOR, an initiative to return all displaced persons back to their homes.
Split into simpler sentences: Other tasks included helping the Royal Engineers clear the Livno minefield, one of the biggest ever laid in the former Yugoslavia. They also deployed covert OPs as part of Op COMET and Op METEOR, an initiative to return all displaced persons back to their homes.