Thank you for the clarification Fren. It was actually the Russian Civil War that kicked off in 1918.

"Civil war broke out in Russia in June 1918, and in July the anti-Bolshevik “White” Russian forces advanced on Yekaterinburg, where Nicholas and his family were located, during a campaign against the Bolshevik forces. Local authorities were ordered to prevent a rescue of the Romanovs, and after a secret meeting of the Yekaterinburg Soviet, a death sentence was passed on the imperial family."

https://www.history.com/this-day-in-history/romanov-family-executed