This is why Joshua had to circumcise them: All the men old enough to fight when they left Egypt died on the journey through the desert after they left Egypt. ¹ 

Now ¹  all the men ²  who left were circumcised, but all the sons ³  born on the journey through the desert after they left Egypt were uncircumcised.

When I brought your fathers out of Egypt, you arrived at the sea. The Egyptians chased your fathers with chariots and horsemen to the Red Sea.

For we heard how the Lord dried up the water of the Red Sea before you when you left Egypt and how you annihilated the two Amorite kings, Sihon and Og, on the other side of the Jordan. ¹ 

The bones of Joseph, which the Israelites had brought up from Egypt, were buried at Shechem in the part of the field that Jacob bought from the sons of Hamor, the father of Shechem, for one hundred pieces of money. ¹  So it became the inheritance of the tribe of Joseph. ² 

Indeed, for forty years the Israelites traveled through the desert until all the men old enough to fight when they left Egypt, the ones who had disobeyed the Lord, died off. ¹  For the Lord had sworn a solemn oath to them that he would not let them see the land he had sworn on oath to give them, ²  a land rich in ³  milk and honey.