Acronym of US military origin, for a chaotic situation (5)

I believe the answer is:

snafu

(Other definitions for snafu that I've seen before include "Bloomer" , "a mess of things" , "Chaos (US slang)" , "Slangy acronym meaning in total confusion" , "in a bad state" .)

I've seen this clue in The Times and The Sunday Times.

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