Quoth wikipedia:
More than a century of archaeological research has discovered nothing which could support the narrative elements of the book of Exodus - the four centuries sojourn in Egypt, the escape of well over a million Israelites from the Delta, or the three months journey through the wilderness to Sinai.[16] The Egyptian records themselves have no mention of anything recorded in Exodus, the wilderness of the southern Sinai peninsula shows no traces of a mass-migration such as Exodus describes, and virtually all the place-names mentioned, including Goshen (the area within Egypt where the Israelites supposedly lived), the store-cities of Pithom and Rameses, the site of the crossing of the Red Sea, and even Mt Sinai itself, have resisted identification.[17] The archaeology of Palestine has equally failed to substantiate the Bible's account of the invasion of Canaan by the Israelites arriving from Egypt some forty years later - of the 31 cities supposedly conquered by Joshua, only one (Bethel) shows a destruction level that equates to the Biblical narrative, and there is general agreement that the origins of Israel lie within Canaan itself.[18] Even those scholars who hold the Exodus to represent historical truth concede that the most the evidence can suggest is plausibility.[19]
I think you are confusing the Exodus with if Israelites were slaves in Egypt. Those are two
different questions.
Here is some evidence relating to a people named the Habiru or possibly the Shasu.
http://en.wikipedia.org/wiki/Habiruhttp://en.wikipedia.org/wiki/Shasu
