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

Ernest in his Entirety: a 14,000 Word Guide to the Ernest P. Worrell Films — Nathan Rabin's Happy Place

Yesterday's Papers: The Sad Sack and Gabby Gob

Principles of Politics Applicable to All Governments

Silver Age Comics: Single Issue Review: Sad Sack #154

Sad Sack: A trip down memory lane

A History of Criticism, Vol. I

The Distributed Proofreaders Canada eBook of The Little Green Man by Edgar Wallace

Adult Recommendations Ela Area Public Library

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 A record of his work in a series of hitherto unpublished letters.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.

George Baker and the Sad Sack - The Comics Journal

Hey, ya'll remember when that sad orange sack of shit made the governors compete for ventilators? Can't wait to pee on his headstone. : r/HermanCainAward

Today's Energy Crisis Is Very Different from the Energy Crisis of 2005

Don Markstein's Toonopedia: Sad Sack

Sad Sack: A trip down memory lane

The Sad Sack During World War II ~ Vintage Everyday