The two sentences that support the inference that the Navajo code talkers were an integral reason for the outcome of WWII are:
- "The Navajos were able to decode messages with such skill and speed that it was said that the Americans could not have won the battle for Iwo Jima without it."
- "He selected four Navajos, initially, to demonstrate the utility of using the Navajo language to transmit military communications."
These sentences emphasize the effectiveness of the Navajo code talkers in military communications and their critical role in ensuring victory in key battles.