OK so my teacher read us the book and what I remember of it is the ankle choker basically they weren’t allowed to write any notes because if those notes got out he could give the enemy you know the code and one of the words that meant some thing with potato Navajo which actually meant grenade and they were allowed to come out story until now because then we could still use it against them and they were praised or thanked for the service or anything because that was just kept secret and it was all I could really remember
So basically they didn’t get any thing for their service until now codeword for hand grenade was potato and they weren’t allowed to take notes whenever they were studying because those notes could get out and the code help them win the war