The tenth plague is where the Jewish holiday of Passover derives its name, because while the Angel of Death visited Egypt it "passed over" Israelite homes, which had been marked with lambs’ blood on the doorposts. It was this last plague that finally made Pharaoh decide to free the children of Israel from slavery.

All of Israel packed up their belongings and left Egypt. Again Pharaoh changed his mind and went after the Israelites. G-d sent a barricade of smoke and fire that blocked the Egyptians from gaining on Moses and his people. Then Moses parted the Red Sea and allowed the Israelites to pass through to the other side. The blockade retreated when the Jews were safely through the sea. Pharaoh and his men went after the crossing people and were drowned by the closing of the water. The Israelites were then freed from being enslaved in Egypt.

haggadah Section: -- Ten Plagues