Complex sentence: Following a UN investigation and pressure from the Vatican, the villagers eventually managed to secure their return, within six months of the massacre, most of the population managed to return from Lebanon, and all the men were released from the POW camps.
Split into simpler sentences: Following a United Nations investigation and pressure from the Vatican, the villagers eventually managed to secure their return within six months of the massacre. Most of the population managed to return from Lebanon, and all the men were released from the POW camps.