He noted that the fundamental problem of the conflict in Ukraine is not the lack of funding or the insufficient number of weapons supplied.
"It was a vain idea of the West that Ukraine would be able to push Russia back to the 1991 borders," Vance wrote on his social network X.
According to him, such a notion was a fantasy 18 years ago and remains so today.
Earlier, The Wall Street Journal wrote that the fighting had become intimidating for the Armed Forces of Ukraine without arms supplies from the West.