One of the last remaining Navajo Code Talkers in the United States, Samuel Sandoval, has died. He was 98.

During World War II, Sandoval was a Navajo Code Talker who transmitted messages using his native language. He died late Friday at a hospital in Shiprock, New Mexico, his wife, Malula told The Associated Press on Saturday.

‘Toughest outfit in the world’: Sandoval chose the Marines

On March 26, 1943, Sandoval enlisted in the United State Marine Corps at a recruitment office in Farmington, New Mexico at the age of 18.

“The Marine Corps was my choice, to begin with,” he told The Arizona Republic in a 2019 article, and it was thanks to the influence of Marines he encountered while working in Hawthorne, Nevada, with his father in November 1942.

While working construction for the Department of Defense in the area, Sandoval said there were two units of military personnel, the Navy and the Marine Corps, stationed on-site. None were Navajo.

“I would become companions with some of the Marines stationed (there),” he said.

He recalls them asking him one day why he wasn’t joining the Marines. Sandoval didn’t ask them why he should join. He already knew what their answer would be: It’s the “toughest outfit in the world.”

That interaction stuck with him, and about a month later, Sandoval said he told his dad that he wanted to go home to Nageezi, New Mexico, to enlist in the military.

Once Sandoval completed basic training, he said the group was transferred to advanced training at Camp Pendleton in Oceanside, California.

“We went into the big barracks not knowing what we’re getting into,” Sandoval recalled.