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The energy crisis caused by the Russia–Ukraine war (RUW) has affected the energy supply chain. The countries most impacted by the sanctions imposed on Russia due to the invasion of Ukraine focused on replacing the countries they import their energy from in the short term and switching fuel, for example, from natural gas to coal in Germany. The objective of this article is to verify how the war has impacted energy trade and electricity generation in Germany and the United Kingdom (UK). The results indicate that the RUW had consequences on these countries' energy sector, significantly affecting fuel trade and electricity generation in the immediate aftermath of the war. • Russia's invasion of Ukraine sparked a global crisis in energy supply chains. • The Russia–Ukraine war led countries, such as Germany, to reactivate coal plants. • The UK replaced Russian fuel imports with those from other countries, like the USA. [ABSTRACT FROM AUTHOR]