The first battle in which the Code Talkers were utilized was Guadalcanal in the Pacific. On August 7, 1942, the First Marine Division landed on the beaches of Guadalcanal with fifteen code talkers (Silversmith). In this battle, the code talkers sent numerous messages by phone and radio that were never decrypted by the Japanese (Silversmith). After this first battle’s success using the Navajo code, the Marines decided to recruit more code talkers. In total, about four hundred more code talkers were recruited and trained (Silversmith).
Due to the complexity of the code, the Japanese never deciphered the intercepted plans which helped the Marines keep their transmitted communication secure. With secure communication, they implemented successful missions in Pacific front battles.

“Navajo getting ready for battle” 

(Navajo Code Talkers)

“Without Navajo, Marines would never have taken the island of Iwo Jima.” -Major Connor, a Marine signal officer (MacDonald).

"Code Talker translating over radio" (Navajo Code Talkers).

"Indian Jargon won our battles!" -Phillip Johnston (Indian Jargon)

"The entire operation was directed in the Navajo code." -Major Connor (Indian Jargon)

These soldiers were instrumental in many battles on the Pacific Front. One of the best examples of the impact of the Navajo Code Talkers transmitting their messages in battles was their efforts at the battle at Iwo Jima. On February 19, 1945 the code talkers entered the almost month long battle where they conveyed over 800 messages without fail (Office).