5. Why were the Navajo code talkers so much more effective than the old way of
code talking?

Because it was never written down. Each generation was never taught they learned from interacting with elders. So only a few knew how to speak and understand. so unless you had a native Navajo person you were out of luck. On top of that they didn’t have words for tank or airplane so they used a code inside the code so they just used something similar bird could be used for airplane and bear could be used for tank