He stated this during a speech at the Charles of Antwerp Foundation in Madrid.
According to Borrell, some of his acquaintances and friends justify Moscow's actions by saying that NATO did not keep its communications.
“It's possible.
This is history," TASS quoted him as saying.
Borrell also admitted that he does not have an exact timeline on how long the unity of the European Union can last in terms of sanctions against Russia.
Earlier, the head of the NATO Military Committee, Dutch Admiral Rob Bauer, at a press conference in Tallinn, said that the alliance began planning its expansion near the borders of Russia "several years ago."
The American Conservative (TAC) editor-in-chief Patrick Buchanan said NATO's eastward expansion has escalated the situation in Ukraine.