origin of 'sad sack' (an inept blundering person)

USA, 1942, Army slang—popularised in the Army weekly ‘Yank’ by ‘The Sad Sack’, a cartoon strip by George Baker, depicting the misfortunes of an inept private

Sad Sack - Alchetron, The Free Social Encyclopedia

Sad Sack - Alchetron, The Free Social Encyclopedia

One Man And A Thousand Tigers : Colonel Kesri Singh : Free Download, Borrow, and Streaming : Internet Archive

The Sad Sack During World War II ~ Vintage Everyday

A Way with Words, My new grand daughter, “Ande Marie” was named after my late mother

History of the United States of America, Vol 1 of 9 (1889)

Orion Magazine - Calling All Fanatics

The Era -- Day By Day, Page 400

Fanfics on Everythingpokemonart - DeviantArt

Adult Recommendations Ela Area Public Library

All About Words - An Adult Approach To Vocabulary Building (PDFDrive), PDF

Principles of Politics Applicable to All Governments

Africa at the beginning of the nineteenth century: issues and prospects

Mandy (comics) - Wikiwand

Darwin, Francis & Seward, A. C. eds. 1903. More letters of Charles Darwin. A record of his work in a series of hitherto unpublished letters. London: John Murray. Volume 1.