The sinking of the swine

This Sunday's reading is from Luke 8:26-39,

Then they arrived at the country of the Gerasenes, which is opposite Galilee. As he stepped out on land, a man of the city who had demons met him. For a long time he had worn no clothes, and he did not live in a house but in the tombs. When he saw Jesus, he fell down before him and shouted at the top of his voice, ‘What have you to do with me, Jesus, Son of the Most High God? I beg you, do not torment me’— for Jesus had commanded the unclean spirit to come out of the man. (For many times it had seized him; he was kept under guard and bound with chains and shackles, but he would break the bonds and be driven by the demon into the wilds.) Jesus then asked him, ‘What is your name?’ He said, ‘Legion’; for many demons had entered him. They begged him not to order them to go back into the abyss.

 Now there on the hillside a large herd of swine was feeding; and the demons begged Jesus to let them enter these. So he gave them permission. Then the demons came out of the man and entered the swine, and the herd rushed down the steep bank into the lake and was drowned.

 When the swineherds saw what had happened, they ran off and told it in the city and in the country. Then people came out to see what had happened, and when they came to Jesus, they found the man from whom the demons had gone sitting at the feet of Jesus, clothed and in his right mind. And they were afraid. Those who had seen it told them how the one who had been possessed by demons had been healed. Then all the people of the surrounding country of the Gerasenes asked Jesus to leave them; for they were seized with great fear. So he got into the boat and returned. The man from whom the demons had gone begged that he might be with him; but Jesus sent him away, saying, ‘Return to your home, and declare how much God has done for you.’ So he went away, proclaiming throughout the city how much Jesus had done for him.

The Gerasenes were obviously not Jewish based on the pig farmers being there. 

Biblestudytools.com has this to say about the location of the Biblical account, 

1. Country of the Gerasenes:

The town itself is not named in Scripture, and is referred to only in the expression, "country of the Gerasenes" (Mark 5:1; Luke 8:26,37; see Westcott and Hort, The New Testament in Greek, Appendix, 11). This describes the district in which Christ met and healed the demoniac from the tombs, where also took place the destruction of the swine. It was on the eastern shore of the Sea of Galilee, and must have been a locality where the steep edges of the Bashan plateau drop close upon the brink of the lake. This condition is fulfilled only by the district immediately South of Wady Semak, North of Qal `at el-Chucn. Here the slopes descend swiftly almost into the sea, and animals, once started on the downward run, could not avoid plunging into the depths. Many ancient tombs are to be seen in the face of the hills. Gerasa itself is probably represented by the ruins of Kurseh on the South side of Wady Semak, just where it opens on the seashore. The ruins of the town are not considerable; but there are remains of a strong wall which must have surrounded the place. Traces of ancient buildings in the vicinity show that there must have been a fairly numerous population in the district.

2. History:

The great and splendid city in the Decapolis is first mentioned as taken after a siege by Alexander Janneus, 85 BC (BJ, I, iv, 8). Josephus names it as marking the eastern limit of Peraea (BJ, III, iii, 3). He calls the inhabitants Syrians, when, at the beginning of the Jewish revolt, the district round Gerasa was laid waste. The Syrians made reprisals, and took many prisoners. With these, however, the Gerasenes dealt mercifully, letting such as wished go free, and escorting them to the border (BJ, II, xviii, 1, 5). Lucius Annius, at the instance of Vespasian, sacked and burned the city, with much slaughter (BJ, IV, ix, 1). From this disaster it appears soon to have recovered, and the period of its greatest prosperity lay, probably, in the 2nd and 3nd centuries of our era. It became the seat of a bishopric, and one of its bishops attended the Council of Chalcedon. Reland (Pal, II, 806) notes certain extant coins of Gerasa, from which it is clear that in the 2nd century it was a center of the worship of Artemis. It was besieged by Baldwin II, in 1121 AD. Mention is made of the strength of the site and the mighty masonry of its walls. William of Tyre calls the city Jarras, and places it 16 miles East of Jordan (Hist, xii, 16). The distance is about 19 miles from the river. It was conquered by the Moslems in the time of Omar (Guy le Strange, Palestine under the Moslems, 462). The sultan of Damascus is said to have fortified it; but there is nothing to show that the Moslems occupied it for any length of time. (More at biblestudytools.com)