In 1997, ahead of the first wave of expansion, George Kennan, the US diplomat who authored the US’s original containment doctrine at start of the Cold War, dubbed Washington's plans to expand the alliance eastward ‘A Fateful Error’, warning that doing so would ruin the then-friendly ties with Russia and make the world less safe.
However, the alliance did not follow suit, and the expansion continued, absorbing former Soviet republics and moving closer to the Russian borders.
Check out Sputnik's infographic for a broader understanding of the issue.
NATO expansion desk
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