"But it was shabby archaeology: U.S. archaeologist George P. Dales proved in 1964 that the owners of The said skeletons had lived in different periods; moreover, neither weapons nor any signs of war were found at the supposed sites of the “mythical massacre,” as he called it: “Despite the extensive excavations at the largest Harappan sites, there is not a single bit of evidence that can be brought forth as unconditional proof of an armed conquest and the destruction on the supposed scale of the Aryan invasion.”"
January 1, 1970
https://en.wikiquote.org/wiki/George_F._Dales