Bible Study Seattle

“In that day the Lord will start His threshing from the flowing stream of the Euphrates to the brook of Egypt, and you will be gathered up one by one, O sons of Israel. It will come about also in that day that a great trumpet will be blown, and those who were perishing in the land of Assyria and who were scattered in the land of Egypt will come and worship the Lord in the holy mountain at Jerusalem.” Isaiah 27:12-13

What day it this referring to? The Sabbath Millennium? Possibly. What is the great trumpet? Is this a great judgment heading westward from the Euphrates? It seems that this is hinting about the destruction of the Assyrians, then their resurrection.