The signs of failure in Russia’s invasion of Ukraine are readily apparent: the tarnished reputation of its military as a modernized, overpowering fighting force; its tattered economy; and a Western alliance more unified than at any time since the worst tensions of the Cold War.

But what is less appreciated is that this is only the latest and potentially the most spectacular in a series of failures suffered by President Vladimir Putin of Russia in Ukraine. If Afghanistan is the "graveyard of empires,” Ukraine is where Putin’s imperial ambitions consistently founder.

In fact, the main reason the Russian leader took such a potentially self-destructive step as a whole-scale invasion, some analysts believe, was to reverse a long line of fiascos dating back to Ukraine’s so-called Orange Revolution in 2004, during the early years of Putin’s presidency.