The oldest of the 13 Code Talkers is 92, and the group includes one of the original 29.

The Code Talker's primary job was to talk and transmit information on tactics, troop movements, orders and other important battlefield information over telegraphs and radios in their native dialect, which totally confused the enemy, reports UPI.

John Brown Jr., one of the original 29 Navajo code talkers who made a big impact during World War II, died in May 2009 at the age of 87, the Navajo Nation said.

Brown received the Congressional Gold Medal in 2001 from President George W. Bush in recognition of his service during World War II, a Navajo Nation news release said.

He was born on Dec. 24, 1921, to Nonabah Bia Begay and Little Policeman (the late John Brown Sr.) in Chinle, Ariz., near Canyon De Chelly.

Brown served in World War II with the U.S. Marines as one of the first of the Navajo Code Talkers, whose ranks eventually exceeded 400, from 1942 to 1945, performing a vital and unusual service.

Five other Code Talkers have died this year, and a museum in their honor is due to open sometime in 2012, say reports.

The Navajo Nation, the largest Indian territory in the United States, straddles the borders of Arizona, New Mexico and Utah. It has its own local government, police and courts.

Below is a documentary video of the marine Navajo Code Talkers talking and singing their story, as Pres. George Bush pays tribute:

Here is another video produced by the Pentagon and U.S. Marine Corp: