Kinda reminds me of the story of king Croesus of Lydia, who asked the oracle of Delphi whether he should wage war against Cyrus the Great, the Oracle promptly told him that by doing so he would "destroy a great empire". Croesus then promptly attacked the Persians and lost.
https://en.wikipedia.org/wiki/Croesus#War_against_Persia_and...