Vladimir Putin's ruthless expansionism has triggered one of the biggest geopolitical crises of the 21st century. His revanchist quest has revealed his unpredictability and much more.

Putin has had an incredible journey from a nondescript KGB officer to all-pervasive autocrat. Why it's a playbook for every wannabe dictator.

The war in Ukraine has raised the stakes for Russia. With the world taking on the Russian bully, can Putin sustain his aggression?

After months of unrelenting warfare and devastating loss of life and property, Russia's war juggernaut rolls on in Ukraine. Russia has changed tactics after initial setbacks. Ukraine's resilient defence seems to be waning. Is it advantage Putin?