Putin's war in Ukraine brought chaos and change to the global energy market. These 4 charts show how the conflict transformed the oil and gas landscape.

• Russia's shocking invasion of Ukraine a year ago fueled fears of an energy crisis in Europe.
• Western countries have responded by bringing in sanctions aimed at reducing the Kremlin's oil and gas revenues.
• These four charts show how the war has changed global energy markets over the past year.

Exactly a year ago, Russian tanks rolled into Ukraine, starting a war that shocked the world and triggered a chain of events that transformed the global energy market.