Born on this day in Lamar, Missouri in modest circumstances, became the 33rd US President on April 12 1945.
He's buried at the Truman Presidential Library & Museum courtyard alongside his wife Bess Wallace Truman and their only child Margaret Truman Daniel, who died in January last year.
The first time I met him was when he came to London for the funeral of Sir Winston Churchill in 1965.
My parents, who were in the diplomatic corps, took me to the post-funeral wake held at the US ambassador's residence in Regent's Park. Lots of Dems were there including Jackie Bouvier Kennedy and some top brass from the Johnson Administration state department.
I was seven years old and on best grown up behavior, sitting kinda quietly through the speeches and wondering when the dining room doors would open for dinner.
Someone close by me suddenly nudged me and said "Here, have a toffee." I turned around and it was the great man himself.
Some minutes later President Truman stood up and made his own eulogy to Churchill, speaking for well nigh on half an hour.
My parents had all the speeches filmed and we still have the cine footage of what was said at the gathering.
Have waited a very long time to publish that footage!
Good things come to those who wait, perhaps...