Final answer:
The purpose of the passage is to highlight the importance of secret codes in military operations, specifically focusing on how the Navajo language was used as a code in World War II.
Step-by-step explanation:
The purpose of the writer in writing this passage is to highlight the importance of secret codes in military operations. The passage explains how the Navajo language was used as a code in World War II, with the Navajo code talkers playing a crucial role in transmitting secret messages for the US military. It also mentions the recognition and honors received by the code talkers, showcasing their intelligence, dedication, and bravery.