USA sanction Pakistan just after the 1965 Indo-Pak war. Pakistan was a strong ally of the USA then, as I believe. Look at the following image. There is a suspension in 1966 in the area of military aid.
India didn't have any supply of weapons from the USA. India was also not involved in an alliance with the USA. Pakistan was a member of SEATO, CENTO. A decrease of assistance affected only Pakistan, not India.
It seems an act of betrayal to me.
So, what prompted the USA to cut the supply of military aid to Pakistan to compromise the alliance? What was the psychology of the USA behind that act?