They were an essential part of the allied effort in the Second World War and now the daughter of a Navajo Code Talker is sharing their story.

Zonnie Gorman's father Carl was among the 29 original Navajo Code Talkers.

Carl died in 1998 at the age of 90 so Zonnie now tells his story across North America.

"My dad and I used to lecture together quite a bit. When he passed on it was a little difficult doing it on my own but I got back into it," said Gorman.

Drawing on their native language, the Navajo Code Talkers developed the only code that was not broken by the Japanese during the Second World War.

The secret code contained native terms for military words and native terms that represented the letters of the alphabet.

Marine cryptologists said they couldn't even transcribe the language, much less decode it.

By the end of the war there were more than 400 Navajo Code Talkers.

"I think it's a very important story fro a number of reasons. These men obviously were World War II heroes which means a lot to a lot of people. For us as native people it's a very important story because it's a story of survival. It's a story of overcoming great odds and being able to maintain who we are and particularly being able to keep our language intact," said Gorman.

Zonnie Gorman is speaking on Tuesday night to a sold-out crowd at the Military Museums of Calgary.