This 98-year-old has proved the art of letter writing isn’t lost.

Alleen Cooper, from California, has written thousands of letters to overseas military members.

The grandmother, whose son fought in the Vietnam War, started writing to strangers during World War II. She continues to write to military members today.

Read: Man Raises Money for Blind Vietnam Vet Who Collects Cans to Support 4 Granddaughters

Six years ago, Cooper started counting her letters. In the past six years alone, she's reportedly sent nearly 7,000.

All of the letters are at least four pages long and she makes sure no two are alike.

Cooper, whose son Larry has struggled with post traumatic stress disorder since the Vietnam War, told WBTV that she wanted to write letters to provide comfort to soldiers.

In return, soldiers have sent her commendations and even flags from their bases.

On Friday, Cooper connected with one of the Marines she’d previously written to.

Cooper first wrote to Staff Sgt. Chris Cantos years ago when he was in a remote area of Afghanistan with no wireless internet, according to the station. The only contact the Marines had with home was letters.

"She would always send us clippings and jokes. She would tell us about her day," Cantos told WBTV.

Read: Vietnam Vet Who Left High School And Became a Marine Finally Gets Diploma After 52 Years

Although her hands now get tired, Cooper said her mission is far from over.

"I decided I'm going to write as long as I can,” Cooper said.

Watch: Vietnam Veteran Finds Long-Lost War Buddy After Son Posts Photo On Twitter

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