How did the exodus happen?

The Jews become enslaved in Egypt, & God Sends Moses to tell Pharaoh to set them free.

It's not possible to know exactly when or if it happened, but some estimates place it at around 1400 BCE

This was after God told Moses to throw his staff and it becamea snake. It was god promising Moses that he is the same God.

According to the Bible around 1441 BC. The Bible confidently states that Moses led the Israelites out of Egypt 480 years before the fourth year of Solomon's reign, which would therefore be...

Possibly it is that God spoke to Moses.