Why was russia not included in the Paris peace conference?

Answer 1

Vladimir Llych Lenin seized power in November 1917. He insisted on ending Russias involvement in the war. One of his first acts was to offer Germany a truce. In march 1918, Germany and Russia signed the treaty of Brest-Litovsk, which ended the war between them. I hope this helped a little!

Answer 2

Russia was also excluded because it had negotiated a separate peace with Germany in 1918, in which Germany gained a large fraction of Russia's land and resources. The treaty′s terms were extremely harsh, as the negotiators at Versailles later pointed out.