Which group of Marines served in every assault conducted in the Pacific from 1942-1945?

The group of Marines that served in every assault conducted in the Pacific from 1942-1945 is the Navajo Code Talkers. They played a crucial role in the Pacific theater, utilizing their native language to create a code that was unbreakable by enemy forces. This code was essential for secure communications during operations and contributed significantly to the successes of various campaigns, ensuring that strategic information remained confidential.

The Navajo Code Talkers' contributions were vital during major battles such as Iwo Jima and Okinawa, where fast and secure communication could have a decisive impact on operations. Their unique skill set and strategic importance made them an integral part of Marine Corps operations throughout the war in the Pacific.

Other groups mentioned, such as the Montford Point Marines, were significant as well but primarily focused on expanding opportunities for African Americans in the Marine Corps rather than direct combat engagements in every Pacific assault. The Marine Corps Women’s Reserve played an essential role in supporting operations but was not involved in direct combat. The 10th Army was a joint force primarily involved in specific campaigns but did not reflect the continuous presence in every assault as the Code Talkers did.