the ukrainian people's republic of soviets (1917–1918) was a short-lived soviet republic of the russian sfsr that was created by the declaration of the kharkiv all-ukrainian congress of soviets "about the self-determination of ukraine" on in the noble assembly building in kharkiv. the republic was later united into the ukrainian soviet republic and, eventually, liquidated, because of a cessation of support from the government of the russian sfsr when the treaty of brest-litovsk was signed.