What happened to the classification status of the Navajo Code after World War II?

The classification status of the Navajo Code after World War II remained classified until 1968. This decision was primarily due to the significance of the code in military operations and the desire to protect the integrity of the communication methods that had been developed for wartime use. During the war, the Navajo Code was instrumental in securing communications among U.S. forces in the Pacific Theater, and its uniqueness made it vital to keep it confidential. The declassification in 1968 allowed a broader audience to appreciate the contributions of the Code Talkers and recognize the important role they played in U.S. military history.

The other options do not accurately reflect the historical timeline or the policies surrounding the Navajo Code. For example, it was not immediately declassified after the war, nor was it shared with allies without restrictions; doing so would have compromised its effectiveness. Similarly, it did not become internationally recognized during that period, as it remained a largely underappreciated aspect of military history until its eventual declassification and recognition later on.