[arooaroo]

Writer Ben Macintyre has written extensively, and lucidly, about deception campaigns of WWI. Agent Zigzag, Operation Mincemeat, and Double Cross all capture the efforts made by the British and its allies. No individual operation swung it but there was an amalgamation of disinformation on various fronts. It’s hard to put a tangible outcome, other than intercepted messages did show the Germans were giving the disinformation due consideration.

I highly recommend any of Ben Macintyre’s books as they’re hugely accessible.