Cryptography/coding example?

Can someone please give me an example of a coding throughout history and how that code was cracked?





I need to write about a half of a page typed about it, so I need it in simple terms.





Please?Cryptography/coding example?
Go for Julius Caesar's original coding. It uses substitution to change letters according to an alphabet in a grid. Only the sender and the recipient could decode it so the messenger could not disclose any details. Eventually, it was cracked.





Or go for the infamous German Enigma cipher. It has a better history.