The document provides historical context about Israel's time in Egypt prior to the events in Exodus. It discusses:
1) The Hyksos ruled Egypt as "rulers of foreign lands" before Joseph arrived, and were still in power for over 150 years after Joseph, meaning the pharaoh Joseph served was likely a Hyksos ruler.
2) After the Hyksos were expelled, a new Egyptian pharaoh took the throne who did not know Joseph, and sought to oppress and enslave the Israelites to prevent them from growing too powerful.
3) Exodus details how God delivered the Israelites from slavery in Egypt through Moses, fulfilling his promise to make them a great nation.